diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 00fac6b1c8e..400202ab61a 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -2742,7 +2742,7 @@ static void project_paint_face_init(
 			int fidx1, fidx2; /* face edge pairs - loop throuh these ((0,1), (1,2), (2,3), (3,0)) or ((0,1), (1,2), (2,0)) for a tri */
 
 			float seam_subsection[4][2];
-			float fac1, fac2, ftot;
+			float fac1, fac2;
 
 			if (outset_uv[0][0] == FLT_MAX) /* first time initialize */
 				uv_image_outset(tf_uv_pxoffset, outset_uv, ps->seam_bleed_px, ibuf->x, ibuf->y, mf->v4 != 0, (ps->faceWindingFlags[face_index] & PROJ_FACE_WINDING_CW) == 0);
@@ -2776,17 +2776,14 @@ static void project_paint_face_init(
 				if ((face_seam_flag & (1 << fidx1)) && /* 1<<fidx1 -> PROJ_FACE_SEAM# */
 				    line_clip_rect2f(bucket_bounds, vCoSS[fidx1], vCoSS[fidx2], bucket_clip_edges[0], bucket_clip_edges[1]))
 				{
-
-					ftot = len_v2v2(vCoSS[fidx1], vCoSS[fidx2]); /* screenspace edge length */
-
-					if (ftot > 0.0f) { /* avoid div by zero */
+					if (len_squared_v2v2(vCoSS[fidx1], vCoSS[fidx2]) > FLT_EPSILON) { /* avoid div by zero */
 						if (mf->v4) {
 							if (fidx1 == 2 || fidx2 == 2) side = 1;
 							else side = 0;
 						}
 
-						fac1 = len_v2v2(vCoSS[fidx1], bucket_clip_edges[0]) / ftot;
-						fac2 = len_v2v2(vCoSS[fidx1], bucket_clip_edges[1]) / ftot;
+						fac1 = line_point_factor_v2(bucket_clip_edges[0], vCoSS[fidx1], vCoSS[fidx2]);
+						fac2 = line_point_factor_v2(bucket_clip_edges[1], vCoSS[fidx1], vCoSS[fidx2]);
 
 						interp_v2_v2v2(seam_subsection[0], tf_uv_pxoffset[fidx1], tf_uv_pxoffset[fidx2], fac1);
 						interp_v2_v2v2(seam_subsection[1], tf_uv_pxoffset[fidx1], tf_uv_pxoffset[fidx2], fac2);