- revert own recent change after discussion, default set hard minimum of colors to 0 but now don't set a hard min, each property needs to define.

- use_old_bump setting only applies to material texture slots.

release/scripts/ui/properties_texture.py

@@ -988,8 +988,9 @@ class TEXTURE_PT_influence(TextureSlotPanel, bpy.types.Panel):
         # color is used on grayscale textures even when use_rgb_to_intensity is disabled.
         col.prop(tex, "color", text="")
 
-        # XXX, dont remove since old files have this users need to be able to disable!
-        col.prop(tex, "use_old_bump", text="Old Bump Mapping")
+        if isinstance(idblock, bpy.types.Material):
+            # XXX, dont remove since old files have this users need to be able to disable!
+            col.prop(tex, "use_old_bump", text="Old Bump Mapping")
 
         col = split.column()
         col.prop(tex, "invert", text="Negative")

source/blender/makesrna/intern/rna_define.c

@@ -887,8 +887,6 @@ PropertyRNA *RNA_def_property(StructOrFunctionRNA *cont_, const char *identifier
 			fprop->hardmax= FLT_MAX;
 
 			if(ELEM(subtype, PROP_COLOR, PROP_COLOR_GAMMA)) {
-				fprop->hardmin= 0.0f; /* disallow colors to go below zero */
-
 				fprop->softmin= 0.0f;
 				fprop->softmax= 1.0f;
 			}