diff --git a/CMakeLists.txt b/CMakeLists.txt
index 43820159456..69d0abe1e25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -817,18 +817,20 @@ set(PLATFORM_LINKLIBS "")
 set(PLATFORM_LINKFLAGS "")
 set(PLATFORM_LINKFLAGS_DEBUG "")
 
-if(WITH_COMPILER_ASAN)
-	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMPILER_ASAN_CFLAGS}")
-	set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CFLAGS}")
+if (NOT CMAKE_BUILD_TYPE MATCHES "Release")
+	if(WITH_COMPILER_ASAN)
+		set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMPILER_ASAN_CFLAGS}")
+		set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CFLAGS}")
 
-	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMPILER_ASAN_CXXFLAGS}")
-	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CXXFLAGS}")
-	if(MSVC)
-		set(COMPILER_ASAN_LINKER_FLAGS "/FUNCTIONPADMIN:6") 
+		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMPILER_ASAN_CXXFLAGS}")
+		set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CXXFLAGS}")
+		if(MSVC)
+			set(COMPILER_ASAN_LINKER_FLAGS "/FUNCTIONPADMIN:6") 
+		endif()
+		set(PLATFORM_LINKLIBS "${PLATFORM_LINKLIBS};${COMPILER_ASAN_LIBRARY}")
+		set(PLATFORM_LINKFLAGS "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
+		set(PLATFORM_LINKFLAGS_DEBUG "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}") 
 	endif()
-	set(PLATFORM_LINKLIBS "${PLATFORM_LINKLIBS};${COMPILER_ASAN_LIBRARY}")
-	set(PLATFORM_LINKFLAGS "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
-	set(PLATFORM_LINKFLAGS_DEBUG "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}") 
 endif()
 
 #-----------------------------------------------------------------------------
diff --git a/source/blender/editors/curve/editcurve.c b/source/blender/editors/curve/editcurve.c
index b6007ca5e18..616017dac0a 100644
--- a/source/blender/editors/curve/editcurve.c
+++ b/source/blender/editors/curve/editcurve.c
@@ -5026,7 +5026,7 @@ static int add_vertex_invoke(bContext *C, wmOperator *op, const wmEvent *event)
 			const float mval[2] = {UNPACK2(event->mval)};
 
 			struct SnapObjectContext *snap_context = ED_transform_snap_object_context_create_view3d(
-			        vc.scene, CTX_data_depsgraph(C), 0, vc.ar, vc.v3d);
+			        vc.bmain, vc.scene, vc.depsgraph, 0, vc.ar, vc.v3d);
 
 			ED_transform_snap_object_project_view3d(
 			        snap_context,
diff --git a/source/blender/editors/curve/editcurve_paint.c b/source/blender/editors/curve/editcurve_paint.c
index e6f5f82f96a..887f3dd13da 100644
--- a/source/blender/editors/curve/editcurve_paint.c
+++ b/source/blender/editors/curve/editcurve_paint.c
@@ -34,6 +34,7 @@
 #include "BKE_context.h"
 #include "BKE_curve.h"
 #include "BKE_fcurve.h"
+#include "BKE_main.h"
 #include "BKE_report.h"
 
 #include "DEG_depsgraph.h"
@@ -616,6 +617,7 @@ static bool curve_draw_init(bContext *C, wmOperator *op, bool is_invoke)
 		}
 	}
 	else {
+		cdd->vc.bmain = CTX_data_main(C);
 		cdd->vc.depsgraph = CTX_data_depsgraph(C);
 		cdd->vc.scene = CTX_data_scene(C);
 		cdd->vc.view_layer = CTX_data_view_layer(C);
diff --git a/source/blender/editors/gpencil/gpencil_edit.c b/source/blender/editors/gpencil/gpencil_edit.c
index 9f01c1d0cd7..45caadf3742 100644
--- a/source/blender/editors/gpencil/gpencil_edit.c
+++ b/source/blender/editors/gpencil/gpencil_edit.c
@@ -57,6 +57,7 @@
 #include "BKE_context.h"
 #include "BKE_gpencil.h"
 #include "BKE_library.h"
+#include "BKE_main.h"
 #include "BKE_report.h"
 #include "BKE_screen.h"
 
diff --git a/source/blender/editors/gpencil/gpencil_paint.c b/source/blender/editors/gpencil/gpencil_paint.c
index 431c087d42c..437d5cef6f8 100644
--- a/source/blender/editors/gpencil/gpencil_paint.c
+++ b/source/blender/editors/gpencil/gpencil_paint.c
@@ -46,14 +46,15 @@
 
 #include "PIL_time.h"
 
-#include "BKE_paint.h"
-#include "BKE_gpencil.h"
+#include "BKE_colortools.h"
 #include "BKE_context.h"
 #include "BKE_global.h"
+#include "BKE_gpencil.h"
+#include "BKE_main.h"
+#include "BKE_paint.h"
 #include "BKE_report.h"
 #include "BKE_screen.h"
 #include "BKE_tracking.h"
-#include "BKE_colortools.h"
 
 #include "DNA_object_types.h"
 #include "DNA_scene_types.h"
@@ -115,6 +116,7 @@ typedef enum eGPencil_PaintFlags {
  *   "p" = op->customdata
  */
 typedef struct tGPsdata {
+	Main *bmain;
 	Scene *scene;       /* current scene from context */
 	struct Depsgraph *depsgraph;
 
@@ -1399,6 +1401,7 @@ static bool gp_session_initdata(bContext *C, tGPsdata *p)
 	}
 
 	/* pass on current scene and window */
+	p->bmain = CTX_data_main(C);
 	p->scene = CTX_data_scene(C);
 	p->depsgraph = CTX_data_depsgraph(C);
 	p->win = CTX_wm_window(C);
diff --git a/source/blender/editors/gpencil/gpencil_utils.c b/source/blender/editors/gpencil/gpencil_utils.c
index 861fdcac080..f6d72d9e575 100644
--- a/source/blender/editors/gpencil/gpencil_utils.c
+++ b/source/blender/editors/gpencil/gpencil_utils.c
@@ -47,10 +47,11 @@
 #include "DNA_space_types.h"
 #include "DNA_view3d_types.h"
 
+#include "BKE_action.h"
 #include "BKE_context.h"
 #include "BKE_gpencil.h"
+#include "BKE_main.h"
 #include "BKE_tracking.h"
-#include "BKE_action.h"
 
 #include "WM_api.h"
 
diff --git a/source/blender/editors/include/ED_object.h b/source/blender/editors/include/ED_object.h
index 3ffab756319..71b713da0d0 100644
--- a/source/blender/editors/include/ED_object.h
+++ b/source/blender/editors/include/ED_object.h
@@ -151,7 +151,7 @@ void ED_object_wpaintmode_exit_ex(struct Object *ob);
 void ED_object_wpaintmode_exit(struct bContext *C);
 
 void ED_object_sculptmode_enter_ex(
-        struct Depsgraph *depsgraph,
+        struct Main *bmain, struct Depsgraph *depsgraph,
         struct Scene *scene, struct Object *ob,
         struct ReportList *reports);
 void ED_object_sculptmode_enter(struct bContext *C, struct ReportList *reports);
diff --git a/source/blender/editors/include/ED_transform_snap_object_context.h b/source/blender/editors/include/ED_transform_snap_object_context.h
index 18d5101ebf7..8ac7dfcf9d8 100644
--- a/source/blender/editors/include/ED_transform_snap_object_context.h
+++ b/source/blender/editors/include/ED_transform_snap_object_context.h
@@ -79,9 +79,9 @@ struct SnapObjectParams {
 
 typedef struct SnapObjectContext SnapObjectContext;
 SnapObjectContext *ED_transform_snap_object_context_create(
-        struct Scene *scene, struct Depsgraph *depsgraph, int flag);
+        struct Main *bmain, struct Scene *scene, struct Depsgraph *depsgraph, int flag);
 SnapObjectContext *ED_transform_snap_object_context_create_view3d(
-        struct Scene *scene, struct Depsgraph *depsgraph, int flag,
+        struct Main *bmain, struct Scene *scene, struct Depsgraph *depsgraph, int flag,
         /* extra args for view3d */
         const struct ARegion *ar, const struct View3D *v3d);
 void ED_transform_snap_object_context_destroy(SnapObjectContext *sctx);
diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index f00982d4102..24e5b3e2662 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -75,6 +75,7 @@ enum eGPUFXFlags;
 
 /* for derivedmesh drawing callbacks, for view3d_select, .... */
 typedef struct ViewContext {
+	struct Main *bmain;
 	struct Depsgraph *depsgraph;
 	struct Scene *scene;
 	struct ViewLayer *view_layer;
@@ -331,7 +332,8 @@ bool ED_view3d_autodist(
         const bool alphaoverride, const float fallback_depth_pt[3]);
 
 /* only draw so ED_view3d_autodist_simple can be called many times after */
-void ED_view3d_autodist_init(struct Depsgraph *depsgraph, struct ARegion *ar, struct View3D *v3d, int mode);
+void ED_view3d_autodist_init(
+        struct Depsgraph *depsgraph, struct ARegion *ar, struct View3D *v3d, int mode);
 bool ED_view3d_autodist_simple(struct ARegion *ar, const int mval[2], float mouse_worldloc[3], int margin, float *force_depth);
 bool ED_view3d_autodist_depth(struct ARegion *ar, const int mval[2], int margin, float *depth);
 bool ED_view3d_autodist_depth_seg(struct ARegion *ar, const int mval_sta[2], const int mval_end[2], int margin, float *depth);
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index ee1c4b30eef..a283068853c 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -860,7 +860,7 @@ void UI_popup_handlers_remove_all(struct bContext *C, struct ListBase *handlers)
  * be used to reinitialize some internal state if user preferences change. */
 
 void UI_init(void);
-void UI_init_userdef(void);
+void UI_init_userdef(struct Main *bmain);
 void UI_reinit_font(void);
 void UI_exit(void);
 
diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index 6cb667cb9a8..28f4c40469a 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -53,10 +53,11 @@
 
 #include "BKE_animsys.h"
 #include "BKE_context.h"
-#include "BKE_unit.h"
+#include "BKE_idprop.h"
+#include "BKE_main.h"
 #include "BKE_scene.h"
 #include "BKE_screen.h"
-#include "BKE_idprop.h"
+#include "BKE_unit.h"
 
 #include "GPU_glew.h"
 #include "GPU_matrix.h"
@@ -4694,10 +4695,10 @@ void UI_init(void)
 }
 
 /* after reading userdef file */
-void UI_init_userdef(void)
+void UI_init_userdef(Main *bmain)
 {
 	/* fix saved themes */
-	init_userdef_do_versions();
+	init_userdef_do_versions(bmain);
 	uiStyleInit();
 }
 
diff --git a/source/blender/editors/interface/interface_eyedropper_depth.c b/source/blender/editors/interface/interface_eyedropper_depth.c
index bd23fbb961d..df09c327da1 100644
--- a/source/blender/editors/interface/interface_eyedropper_depth.c
+++ b/source/blender/editors/interface/interface_eyedropper_depth.c
@@ -41,6 +41,7 @@
 #include "BLI_math_vector.h"
 
 #include "BKE_context.h"
+#include "BKE_main.h"
 #include "BKE_screen.h"
 #include "BKE_unit.h"
 
diff --git a/source/blender/editors/interface/interface_intern.h b/source/blender/editors/interface/interface_intern.h
index c7cf03a44dd..b5bf9be737b 100644
--- a/source/blender/editors/interface/interface_intern.h
+++ b/source/blender/editors/interface/interface_intern.h
@@ -784,7 +784,7 @@ void ui_icon_ensure_deferred(const struct bContext *C, const int icon_id, const
 int ui_id_icon_get(const struct bContext *C, struct ID *id, const bool big);
 
 /* resources.c */
-void init_userdef_do_versions(void);
+void init_userdef_do_versions(struct Main *bmain);
 void ui_theme_init_default(void);
 void ui_style_init_default(void);
 void ui_resources_init(void);
diff --git a/source/blender/editors/interface/resources.c b/source/blender/editors/interface/resources.c
index 1bfb050563d..2a61be21589 100644
--- a/source/blender/editors/interface/resources.c
+++ b/source/blender/editors/interface/resources.c
@@ -1818,10 +1818,8 @@ void UI_make_axis_color(const unsigned char src_col[3], unsigned char dst_col[3]
 /* ************************************************************* */
 
 /* patching UserDef struct and Themes */
-void init_userdef_do_versions(void)
+void init_userdef_do_versions(Main *bmain)
 {
-	Main *bmain = G.main;
-
 #define USER_VERSION_ATLEAST(ver, subver) MAIN_VERSION_ATLEAST(bmain, ver, subver)
 
 	/* the UserDef struct is not corrected with do_versions() .... ugh! */
diff --git a/source/blender/editors/mesh/editmesh_tools.c b/source/blender/editors/mesh/editmesh_tools.c
index 5c6b6da54a6..17f643636cf 100644
--- a/source/blender/editors/mesh/editmesh_tools.c
+++ b/source/blender/editors/mesh/editmesh_tools.c
@@ -359,6 +359,7 @@ void MESH_OT_unsubdivide(wmOperatorType *ot)
 
 void EMBM_project_snap_verts(bContext *C, ARegion *ar, BMEditMesh *em)
 {
+	Main *bmain = CTX_data_main(C);
 	Object *obedit = em->ob;
 	BMIter iter;
 	BMVert *eve;
@@ -366,7 +367,7 @@ void EMBM_project_snap_verts(bContext *C, ARegion *ar, BMEditMesh *em)
 	ED_view3d_init_mats_rv3d(obedit, ar->regiondata);
 
 	struct SnapObjectContext *snap_context = ED_transform_snap_object_context_create_view3d(
-	        CTX_data_scene(C), CTX_data_depsgraph(C), 0,
+	        bmain, CTX_data_scene(C), CTX_data_depsgraph(C), 0,
 	        ar, CTX_wm_view3d(C));
 
 	BM_ITER_MESH (eve, &iter, em->bm, BM_VERTS_OF_MESH) {
diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index 70a8c725284..a59e2abdb5f 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -5643,7 +5643,7 @@ static int ed_object_sculptmode_flush_recalc_flag(Scene *scene, Object *ob, Mult
 }
 
 void ED_object_sculptmode_enter_ex(
-        Depsgraph *depsgraph,
+        Main *bmain, Depsgraph *depsgraph,
         Scene *scene, Object *ob,
         ReportList *reports)
 {
@@ -5695,7 +5695,7 @@ void ED_object_sculptmode_enter_ex(
 	Paint *paint = BKE_paint_get_active_from_paintmode(scene, ePaintSculpt);
 	BKE_paint_init(scene, ePaintSculpt, PAINT_CURSOR_SCULPT);
 
-	paint_cursor_start_explicit(paint, G.main->wm.first, sculpt_poll_view3d);
+	paint_cursor_start_explicit(paint, bmain->wm.first, sculpt_poll_view3d);
 
 	/* Check dynamic-topology flag; re-enter dynamic-topology mode when changing modes,
 	 * As long as no data was added that is not supported. */
@@ -5751,10 +5751,11 @@ void ED_object_sculptmode_enter_ex(
 
 void ED_object_sculptmode_enter(struct bContext *C, ReportList *reports)
 {
+	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
 	Object *ob = CTX_data_active_object(C);
 	Depsgraph *depsgraph = CTX_data_depsgraph(C);
-	ED_object_sculptmode_enter_ex(depsgraph, scene, ob, reports);
+	ED_object_sculptmode_enter_ex(bmain, depsgraph, scene, ob, reports);
 }
 
 void ED_object_sculptmode_exit_ex(
@@ -5815,6 +5816,7 @@ void ED_object_sculptmode_exit(bContext *C)
 static int sculpt_mode_toggle_exec(bContext *C, wmOperator *op)
 {
 	struct wmMsgBus *mbus = CTX_wm_message_bus(C);
+	Main *bmain = CTX_data_main(C);
 	Depsgraph *depsgraph = CTX_data_depsgraph_on_load(C);
 	Scene *scene = CTX_data_scene(C);
 	Object *ob = CTX_data_active_object(C);
@@ -5831,7 +5833,7 @@ static int sculpt_mode_toggle_exec(bContext *C, wmOperator *op)
 		ED_object_sculptmode_exit_ex(depsgraph, scene, ob);
 	}
 	else {
-		ED_object_sculptmode_enter_ex(depsgraph, scene, ob, op->reports);
+		ED_object_sculptmode_enter_ex(bmain, depsgraph, scene, ob, op->reports);
 	}
 
 	WM_event_add_notifier(C, NC_SCENE | ND_MODE, scene);
diff --git a/source/blender/editors/space_view3d/view3d_edit.c b/source/blender/editors/space_view3d/view3d_edit.c
index e2ff809db36..cdf2106d8bf 100644
--- a/source/blender/editors/space_view3d/view3d_edit.c
+++ b/source/blender/editors/space_view3d/view3d_edit.c
@@ -131,6 +131,7 @@ static void view3d_operator_properties_common(wmOperatorType *ot, const enum eV3
 
 typedef struct ViewOpsData {
 	/** Context pointers (assigned by #viewops_data_alloc). */
+	Main *bmain;
 	Scene *scene;
 	ScrArea *sa;
 	ARegion *ar;
@@ -221,6 +222,7 @@ static void viewops_data_alloc(bContext *C, wmOperator *op)
 
 	/* store data */
 	op->customdata = vod;
+	vod->bmain = CTX_data_main(C);
 	vod->depsgraph = CTX_data_depsgraph(C);
 	vod->scene = CTX_data_scene(C);
 	vod->sa = CTX_wm_area(C);
@@ -4592,6 +4594,7 @@ void ED_view3d_cursor3d_position(bContext *C, float fp[3], const int mval[2])
 
 void ED_view3d_cursor3d_update(bContext *C, const int mval[2])
 {
+	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
 	View3D *v3d = CTX_wm_view3d(C);
 	ARegion *ar = CTX_wm_region(C);
@@ -4609,7 +4612,7 @@ void ED_view3d_cursor3d_update(bContext *C, const int mval[2])
 		float ray_no[3];
 
 		struct SnapObjectContext *snap_context = ED_transform_snap_object_context_create_view3d(
-		        scene, CTX_data_depsgraph(C), 0, ar, v3d);
+		        bmain, scene, CTX_data_depsgraph(C), 0, ar, v3d);
 
 		float obmat[4][4];
 		Object *ob_dummy = NULL;
diff --git a/source/blender/editors/space_view3d/view3d_intern.h b/source/blender/editors/space_view3d/view3d_intern.h
index 6c9749e5eeb..4b1c7986b6e 100644
--- a/source/blender/editors/space_view3d/view3d_intern.h
+++ b/source/blender/editors/space_view3d/view3d_intern.h
@@ -134,7 +134,8 @@ void VIEW3D_OT_ruler(struct wmOperatorType *ot);
 
 /* drawobject.c */
 void draw_object_backbufsel(
-        struct Depsgraph *depsgraph, Scene *scene, View3D *v3d, RegionView3D *rv3d, struct Object *ob,
+        struct Depsgraph *depsgraph, Scene *scene,
+        View3D *v3d, RegionView3D *rv3d, struct Object *ob,
         short select_mode);
 
 int view3d_effective_drawtype(const struct View3D *v3d);
diff --git a/source/blender/editors/space_view3d/view3d_manipulator_ruler.c b/source/blender/editors/space_view3d/view3d_manipulator_ruler.c
index 9cde5ffc5e3..cd918695f60 100644
--- a/source/blender/editors/space_view3d/view3d_manipulator_ruler.c
+++ b/source/blender/editors/space_view3d/view3d_manipulator_ruler.c
@@ -31,8 +31,10 @@
 #include "BLT_translation.h"
 
 #include "BKE_context.h"
-#include "BKE_object.h"
 #include "BKE_gpencil.h"
+#include "BKE_main.h"
+
+#include "BKE_object.h"
 #include "BKE_unit.h"
 
 #include "DNA_object_types.h"
@@ -263,6 +265,7 @@ static bool view3d_ruler_pick(
  */
 static void ruler_state_set(bContext *C, RulerInfo *ruler_info, int state)
 {
+	Main *bmain = CTX_data_main(C);
 	if (state == ruler_info->state) {
 		return;
 	}
@@ -278,7 +281,7 @@ static void ruler_state_set(bContext *C, RulerInfo *ruler_info, int state)
 	}
 	else if (state == RULER_STATE_DRAG) {
 		ruler_info->snap_context = ED_transform_snap_object_context_create_view3d(
-		        CTX_data_scene(C), CTX_data_depsgraph(C), 0,
+		        bmain, CTX_data_scene(C), CTX_data_depsgraph(C), 0,
 		        ruler_info->ar, CTX_wm_view3d(C));
 	}
 	else {
diff --git a/source/blender/editors/space_view3d/view3d_ruler.c b/source/blender/editors/space_view3d/view3d_ruler.c
index 54579e93413..c30b72bfb95 100644
--- a/source/blender/editors/space_view3d/view3d_ruler.c
+++ b/source/blender/editors/space_view3d/view3d_ruler.c
@@ -38,8 +38,9 @@
 #include "BLT_translation.h"
 
 #include "BKE_context.h"
-#include "BKE_unit.h"
 #include "BKE_gpencil.h"
+#include "BKE_main.h"
+#include "BKE_unit.h"
 
 #include "BIF_gl.h"
 
@@ -267,6 +268,7 @@ static bool view3d_ruler_pick(RulerInfo *ruler_info, const float mval[2],
  */
 static void ruler_state_set(bContext *C, RulerInfo *ruler_info, int state)
 {
+	Main *bmain = CTX_data_main(C);
 	if (state == ruler_info->state) {
 		return;
 	}
@@ -282,7 +284,7 @@ static void ruler_state_set(bContext *C, RulerInfo *ruler_info, int state)
 	}
 	else if (state == RULER_STATE_DRAG) {
 		ruler_info->snap_context = ED_transform_snap_object_context_create_view3d(
-		        CTX_data_scene(C), CTX_data_depsgraph(C), 0,
+		        bmain, CTX_data_scene(C), CTX_data_depsgraph(C), 0,
 		        ruler_info->ar, CTX_wm_view3d(C));
 	}
 	else {
diff --git a/source/blender/editors/space_view3d/view3d_select.c b/source/blender/editors/space_view3d/view3d_select.c
index bb12c8236cf..f4e39c7a563 100644
--- a/source/blender/editors/space_view3d/view3d_select.c
+++ b/source/blender/editors/space_view3d/view3d_select.c
@@ -116,6 +116,7 @@ void ED_view3d_viewcontext_init(bContext *C, ViewContext *vc)
 {
 	memset(vc, 0, sizeof(ViewContext));
 	vc->ar = CTX_wm_region(C);
+	vc->bmain = CTX_data_main(C);
 	vc->depsgraph = CTX_data_depsgraph(C);
 	vc->scene = CTX_data_scene(C);
 	vc->view_layer = CTX_data_view_layer(C);
diff --git a/source/blender/editors/space_view3d/view3d_utils.c b/source/blender/editors/space_view3d/view3d_utils.c
index 8b0b461d443..ca5375b6b54 100644
--- a/source/blender/editors/space_view3d/view3d_utils.c
+++ b/source/blender/editors/space_view3d/view3d_utils.c
@@ -46,6 +46,7 @@
 
 #include "BKE_camera.h"
 #include "BKE_context.h"
+#include "BKE_main.h"
 #include "BKE_object.h"
 #include "BKE_screen.h"
 
@@ -899,7 +900,7 @@ static float view_autodist_depth_margin(ARegion *ar, const int mval[2], int marg
  * \param fallback_depth_pt: Use this points depth when no depth can be found.
  */
 bool ED_view3d_autodist(
-        struct Depsgraph *depsgraph, ARegion *ar, View3D *v3d,
+        Depsgraph *depsgraph, ARegion *ar, View3D *v3d,
         const int mval[2], float mouse_worldloc[3],
         const bool alphaoverride, const float fallback_depth_pt[3])
 {
@@ -936,7 +937,7 @@ bool ED_view3d_autodist(
 	}
 }
 
-void ED_view3d_autodist_init(struct Depsgraph *depsgraph,
+void ED_view3d_autodist_init(Depsgraph *depsgraph,
         ARegion *ar, View3D *v3d, int mode)
 {
 	/* Get Z Depths, needed for perspective, nice for ortho */
diff --git a/source/blender/editors/space_view3d/view3d_walk.c b/source/blender/editors/space_view3d/view3d_walk.c
index a7c97ba4d4a..352e85703bc 100644
--- a/source/blender/editors/space_view3d/view3d_walk.c
+++ b/source/blender/editors/space_view3d/view3d_walk.c
@@ -37,6 +37,7 @@
 #include "BLI_utildefines.h"
 
 #include "BKE_context.h"
+#include "BKE_main.h"
 #include "BKE_report.h"
 
 #include "BLT_translation.h"
@@ -507,6 +508,7 @@ static float userdef_speed = -1.f;
 
 static bool initWalkInfo(bContext *C, WalkInfo *walk, wmOperator *op)
 {
+	Main *bmain = CTX_data_main(C);
 	wmWindow *win = CTX_wm_window(C);
 
 	walk->rv3d = CTX_wm_region_view3d(C);
@@ -602,7 +604,7 @@ static bool initWalkInfo(bContext *C, WalkInfo *walk, wmOperator *op)
 	walk->rv3d->rflag |= RV3D_NAVIGATING;
 
 	walk->snap_context = ED_transform_snap_object_context_create_view3d(
-	        walk->scene, CTX_data_depsgraph(C), 0,
+	        bmain, walk->scene, CTX_data_depsgraph(C), 0,
 	        walk->ar, walk->v3d);
 
 	walk->v3d_camera_control = ED_view3d_cameracontrol_acquire(
diff --git a/source/blender/editors/transform/transform_conversions.c b/source/blender/editors/transform/transform_conversions.c
index 0bc03880096..45941ba6f39 100644
--- a/source/blender/editors/transform/transform_conversions.c
+++ b/source/blender/editors/transform/transform_conversions.c
@@ -851,6 +851,8 @@ static bool pchan_autoik_adjust(bPoseChannel *pchan, short chainlen)
 /* change the chain-length of auto-ik */
 void transform_autoik_update(TransInfo *t, short mode)
 {
+	Main *bmain = CTX_data_main(t->context);
+
 	short *chainlen = &t->settings->autoik_chainlen;
 	bPoseChannel *pchan;
 
@@ -887,12 +889,12 @@ void transform_autoik_update(TransInfo *t, short mode)
 
 	if (changed) {
 		/* TODO(sergey): Consider doing partial update only. */
-		DEG_relations_tag_update(G.main);
+		DEG_relations_tag_update(bmain);
 	}
 }
 
 /* frees temporal IKs */
-static void pose_grab_with_ik_clear(Object *ob)
+static void pose_grab_with_ik_clear(Main *bmain, Object *ob)
 {
 	bKinematicConstraint *data;
 	bPoseChannel *pchan;
@@ -930,7 +932,7 @@ static void pose_grab_with_ik_clear(Object *ob)
 
 	if (relations_changed) {
 		/* TODO(sergey): Consider doing partial update only. */
-		DEG_relations_tag_update(G.main);
+		DEG_relations_tag_update(bmain);
 	}
 }
 
@@ -1038,7 +1040,7 @@ static short pose_grab_with_ik_children(bPose *pose, Bone *bone)
 }
 
 /* main call which adds temporal IK chains */
-static short pose_grab_with_ik(Object *ob)
+static short pose_grab_with_ik(Main *bmain, Object *ob)
 {
 	bArmature *arm;
 	bPoseChannel *pchan, *parent;
@@ -1084,8 +1086,8 @@ static short pose_grab_with_ik(Object *ob)
 	/* iTaSC needs clear for new IK constraints */
 	if (tot_ik) {
 		BIK_clear_data(ob->pose);
-		/* TODO(sergey): Consuder doing partial update only. */
-		DEG_relations_tag_update(G.main);
+		/* TODO(sergey): Consider doing partial update only. */
+		DEG_relations_tag_update(bmain);
 	}
 
 	return (tot_ik) ? 1 : 0;
@@ -1108,6 +1110,7 @@ static void createTransPose(TransInfo *t, Object **objects, uint objects_len)
 			tc->poseobj = objects[th_index];
 		}
 	}
+	Main *bmain = CTX_data_main(t->context);
 
 	t->data_len_all = 0;
 
@@ -1135,7 +1138,7 @@ static void createTransPose(TransInfo *t, Object **objects, uint objects_len)
 
 		/* do we need to add temporal IK chains? */
 		if ((arm->flag & ARM_AUTO_IK) && t->mode == TFM_TRANSLATION) {
-			ik_on = pose_grab_with_ik(ob);
+			ik_on = pose_grab_with_ik(bmain, ob);
 			if (ik_on) t->flag |= T_AUTOIK;
 		}
 
@@ -5776,8 +5779,7 @@ static void trans_object_base_deps_flag_finish(ViewLayer *view_layer)
 /* it deselects Bases, so we have to call the clear function always after */
 static void set_trans_object_base_flags(TransInfo *t)
 {
-	/* TODO(sergey): Get rid of global, use explicit main. */
-	Main *bmain = G.main;
+	Main *bmain = CTX_data_main(t->context);
 	ViewLayer *view_layer = t->view_layer;
 	Scene *scene = t->scene;
 	Depsgraph *depsgraph = BKE_scene_get_depsgraph(scene, view_layer, true);
@@ -6329,6 +6331,9 @@ static void special_aftertrans_update__mesh(bContext *UNUSED(C), TransInfo *t)
  * */
 void special_aftertrans_update(bContext *C, TransInfo *t)
 {
+	Main *bmain = CTX_data_main(t->context);
+	BLI_assert(bmain == CTX_data_main(C));
+
 	Object *ob;
 //	short redrawipo=0, resetslowpar=1;
 	const bool canceled = (t->state == TRANS_CANCEL);
@@ -6517,7 +6522,7 @@ void special_aftertrans_update(bContext *C, TransInfo *t)
 
 				// XXX: BAD! this get gpencil datablocks directly from main db...
 				// but that's how this currently works :/
-				for (gpd = G.main->gpencil.first; gpd; gpd = gpd->id.next) {
+				for (gpd = bmain->gpencil.first; gpd; gpd = gpd->id.next) {
 					if (ID_REAL_USERS(gpd))
 						posttrans_gpd_clean(gpd);
 				}
@@ -6537,7 +6542,7 @@ void special_aftertrans_update(bContext *C, TransInfo *t)
 
 				// XXX: BAD! this get gpencil datablocks directly from main db...
 				// but that's how this currently works :/
-				for (mask = G.main->mask.first; mask; mask = mask->id.next) {
+				for (mask = bmain->mask.first; mask; mask = mask->id.next) {
 					if (ID_REAL_USERS(mask))
 						posttrans_mask_clean(mask);
 				}
@@ -6702,7 +6707,7 @@ void special_aftertrans_update(bContext *C, TransInfo *t)
 			}
 
 			if (t->mode == TFM_TRANSLATION)
-				pose_grab_with_ik_clear(ob);
+				pose_grab_with_ik_clear(bmain, ob);
 
 			/* automatic inserting of keys and unkeyed tagging - only if transform wasn't canceled (or TFM_DUMMY) */
 			if (!canceled && (t->mode != TFM_DUMMY)) {
diff --git a/source/blender/editors/transform/transform_snap.c b/source/blender/editors/transform/transform_snap.c
index 44d9915b3e5..257f85064f2 100644
--- a/source/blender/editors/transform/transform_snap.c
+++ b/source/blender/editors/transform/transform_snap.c
@@ -270,6 +270,8 @@ eRedrawFlag handleSnapping(TransInfo *t, const wmEvent *event)
 
 void applyProject(TransInfo *t)
 {
+	Main *bmain = CTX_data_main(t->context);
+
 	/* XXX FLICKER IN OBJECT MODE */
 	if ((t->tsnap.project) && activeSnap(t) && (t->flag & T_NO_PROJECT) == 0) {
 		float tvec[3];
@@ -500,6 +502,7 @@ static bool bm_face_is_snap_target(BMFace *f, void *UNUSED(user_data))
 
 static void initSnappingMode(TransInfo *t)
 {
+	Main *bmain = CTX_data_main(t->context);
 	ToolSettings *ts = t->settings;
 	/* All obedit types will match. */
 	const int obedit_type = t->data_container->obedit ? t->data_container->obedit->type : -1;
@@ -587,7 +590,7 @@ static void initSnappingMode(TransInfo *t)
 	if (t->spacetype == SPACE_VIEW3D) {
 		if (t->tsnap.object_context == NULL) {
 			t->tsnap.object_context = ED_transform_snap_object_context_create_view3d(
-			        t->scene, t->depsgraph, 0, t->ar, t->view);
+			        bmain, t->scene, t->depsgraph, 0, t->ar, t->view);
 
 			ED_transform_snap_object_context_set_editmesh_callbacks(
 			        t->tsnap.object_context,
diff --git a/source/blender/editors/transform/transform_snap_object.c b/source/blender/editors/transform/transform_snap_object.c
index 9a8ecc86230..e19320fa220 100644
--- a/source/blender/editors/transform/transform_snap_object.c
+++ b/source/blender/editors/transform/transform_snap_object.c
@@ -114,6 +114,7 @@ typedef struct SnapObjectData_EditMesh {
 } SnapObjectData_EditMesh;
 
 struct SnapObjectContext {
+	Main *bmain;
 	Scene *scene;
 	Depsgraph *depsgraph;
 
@@ -2270,12 +2271,13 @@ static short snapObjectsRay(
  * \{ */
 
 SnapObjectContext *ED_transform_snap_object_context_create(
-        Scene *scene, Depsgraph *depsgraph, int flag)
+        Main *bmain, Scene *scene, Depsgraph *depsgraph, int flag)
 {
 	SnapObjectContext *sctx = MEM_callocN(sizeof(*sctx), __func__);
 
 	sctx->flag = flag;
 
+	sctx->bmain = bmain;
 	sctx->scene = scene;
 	sctx->depsgraph = depsgraph;
 
@@ -2286,11 +2288,11 @@ SnapObjectContext *ED_transform_snap_object_context_create(
 }
 
 SnapObjectContext *ED_transform_snap_object_context_create_view3d(
-        Scene *scene, Depsgraph *depsgraph, int flag,
+        Main *bmain, Scene *scene, Depsgraph *depsgraph, int flag,
         /* extra args for view3d */
         const ARegion *ar, const View3D *v3d)
 {
-	SnapObjectContext *sctx = ED_transform_snap_object_context_create(scene, depsgraph, flag);
+	SnapObjectContext *sctx = ED_transform_snap_object_context_create(bmain, scene, depsgraph, flag);
 
 	sctx->use_v3d = true;
 	sctx->v3d_data.ar = ar;
diff --git a/source/blender/makesrna/intern/rna_scene_api.c b/source/blender/makesrna/intern/rna_scene_api.c
index 429ec1cba4d..ba03472d8d5 100644
--- a/source/blender/makesrna/intern/rna_scene_api.c
+++ b/source/blender/makesrna/intern/rna_scene_api.c
@@ -164,7 +164,7 @@ static void rna_SceneRender_get_frame_path(
 }
 
 static void rna_Scene_ray_cast(
-        Scene *scene, ViewLayer *view_layer,
+        Scene *scene, Main *bmain, ViewLayer *view_layer,
         float origin[3], float direction[3], float ray_dist,
         int *r_success, float r_location[3], float r_normal[3], int *r_index,
         Object **r_ob, float r_obmat[16])
@@ -172,8 +172,7 @@ static void rna_Scene_ray_cast(
 	normalize_v3(direction);
 
 	Depsgraph *depsgraph = BKE_scene_get_depsgraph(scene, view_layer, true);
-	SnapObjectContext *sctx = ED_transform_snap_object_context_create(
-	        scene, depsgraph, 0);
+	SnapObjectContext *sctx = ED_transform_snap_object_context_create(bmain, scene, depsgraph, 0);
 
 	bool ret = ED_transform_snap_object_project_ray_ex(
 	        sctx,
@@ -309,6 +308,7 @@ void RNA_api_scene(StructRNA *srna)
 	
 	/* Ray Cast */
 	func = RNA_def_function(srna, "ray_cast", "rna_Scene_ray_cast");
+	RNA_def_function_flag(func, FUNC_USE_MAIN);
 	RNA_def_function_ui_description(func, "Cast a ray onto in object space");
 	parm = RNA_def_pointer(func, "view_layer", "ViewLayer", "", "Scene Layer");
 	RNA_def_parameter_flags(parm, PROP_NEVER_NULL, PARM_REQUIRED);
diff --git a/source/blender/python/intern/gpu_offscreen.c b/source/blender/python/intern/gpu_offscreen.c
index a8ec828c13f..a65469ea739 100644
--- a/source/blender/python/intern/gpu_offscreen.c
+++ b/source/blender/python/intern/gpu_offscreen.c
@@ -35,6 +35,8 @@
 
 #include "WM_types.h"
 
+#include "BKE_global.h"
+
 #include "ED_screen.h"
 
 #include "GPU_framebuffer.h"
diff --git a/source/blender/windowmanager/intern/wm_files.c b/source/blender/windowmanager/intern/wm_files.c
index 2060b1bf531..3aaec875627 100644
--- a/source/blender/windowmanager/intern/wm_files.c
+++ b/source/blender/windowmanager/intern/wm_files.c
@@ -340,7 +340,7 @@ static void wm_window_match_do(
 static void wm_init_userdef(Main *bmain, const bool read_userdef_from_memory)
 {
 	/* versioning is here */
-	UI_init_userdef();
+	UI_init_userdef(bmain);
 
 	MEM_CacheLimiter_set_maximum(((size_t)U.memcachelimit) * 1024 * 1024);
 	BKE_sound_init(bmain);
@@ -1157,7 +1157,7 @@ static int wm_file_write(bContext *C, const char *filepath, int fileflags, Repor
 	/* blend file thumbnail */
 	/* save before exit_editmode, otherwise derivedmeshes for shared data corrupt #27765) */
 	/* Main now can store a .blend thumbnail, usefull for background mode or thumbnail customization. */
-	main_thumb = thumb = CTX_data_main(C)->blen_thumb;
+	main_thumb = thumb = bmain->blen_thumb;
 	if ((U.flag & USER_SAVE_PREVIEWS) && BLI_thread_is_main()) {
 		ibuf_thumb = blend_file_thumb(C, CTX_data_scene(C), CTX_wm_screen(C), &thumb);
 	}