1 files changed, 9 insertions, 10 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 27d19532785..ca012f20f01 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -414,6 +414,7 @@ typedef struct ProjPaintState {
   int totvert_eval;
 
   const MVert *mvert_eval;
+  const float (*vert_normals)[3];
   const MEdge *medge_eval;
   const MPoly *mpoly_eval;
   const MLoop *mloop_eval;
@@ -1718,10 +1719,10 @@ static float project_paint_uvpixel_mask(const ProjPaintState *ps,
     float no[3], angle_cos;
 
     if (mp->flag & ME_SMOOTH) {
-      const short *no1, *no2, *no3;
-      no1 = ps->mvert_eval[lt_vtri[0]].no;
-      no2 = ps->mvert_eval[lt_vtri[1]].no;
-      no3 = ps->mvert_eval[lt_vtri[2]].no;
+      const float *no1, *no2, *no3;
+      no1 = ps->vert_normals[lt_vtri[0]];
+      no2 = ps->vert_normals[lt_vtri[1]];
+      no3 = ps->vert_normals[lt_vtri[2]];
 
       no[0] = w[0] * no1[0] + w[1] * no2[0] + w[2] * no3[0];
       no[1] = w[0] * no1[1] + w[1] * no2[1] + w[2] * no3[1];
@@ -3871,7 +3872,6 @@ static void proj_paint_state_screen_coords_init(ProjPaintState *ps, const int di
 
 static void proj_paint_state_cavity_init(ProjPaintState *ps)
 {
-  const MVert *mv;
   const MEdge *me;
   float *cavities;
   int a;
@@ -3891,13 +3891,11 @@ static void proj_paint_state_cavity_init(ProjPaintState *ps)
       sub_v3_v3(edges[me->v1], e);
       counter[me->v1]++;
     }
-    for (a = 0, mv = ps->mvert_eval; a < ps->totvert_eval; a++, mv++) {
+    for (a = 0; a < ps->totvert_eval; a++) {
       if (counter[a] > 0) {
-        float no[3];
         mul_v3_fl(edges[a], 1.0f / counter[a]);
-        normal_short_to_float_v3(no, mv->no);
         /* Augment the difference. */
-        cavities[a] = saacos(10.0f * dot_v3v3(no, edges[a])) * (float)M_1_PI;
+        cavities[a] = saacos(10.0f * dot_v3v3(ps->vert_normals[a], edges[a])) * (float)M_1_PI;
       }
       else {
         cavities[a] = 0.0;
@@ -3964,7 +3962,7 @@ static void proj_paint_state_vert_flags_init(ProjPaintState *ps)
     ps->vertFlags = MEM_callocN(sizeof(char) * ps->totvert_eval, "paint-vertFlags");
 
     for (a = 0, mv = ps->mvert_eval; a < ps->totvert_eval; a++, mv++) {
-      normal_short_to_float_v3(no, mv->no);
+      copy_v3_v3(no, ps->vert_normals[a]);
       if (UNLIKELY(ps->is_flip_object)) {
         negate_v3(no);
       }
@@ -4064,6 +4062,7 @@ static bool proj_paint_state_mesh_eval_init(const bContext *C, ProjPaintState *p
   ps->mat_array[totmat - 1] = NULL;
 
   ps->mvert_eval = ps->me_eval->mvert;
+  ps->vert_normals = BKE_mesh_vertex_normals_ensure(ps->me_eval);
   if (ps->do_mask_cavity) {
     ps->medge_eval = ps->me_eval->medge;
   }