EEVEE: Motion Blur: Fix issue with batch overflowing with VBOs

1 files changed, 10 insertions, 8 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_motion_blur.c b/source/blender/draw/engines/eevee/eevee_motion_blur.c
index a02007fede9..91a9939cd1f 100644
--- a/source/blender/draw/engines/eevee/eevee_motion_blur.c
+++ b/source/blender/draw/engines/eevee/eevee_motion_blur.c
@@ -492,14 +492,7 @@ void EEVEE_motion_blur_cache_finish(EEVEE_Data *vedata)
               }
               else {
                 /* Modify the batch to include the previous & next position. */
-                if (i == MB_PREV) {
-                  GPU_batch_vertbuf_add_ex(batch, vbo, true);
-                  mb_geom->vbo[i] = NULL;
-                }
-                else {
-                  /* This VBO can be reuse by next time step. Don't pass ownership. */
-                  GPU_batch_vertbuf_add_ex(batch, vbo, false);
-                }
+                GPU_batch_vertbuf_add_ex(batch, vbo, false);
               }
             }
           }
@@ -568,6 +561,15 @@ void EEVEE_motion_blur_swap_data(EEVEE_Data *vedata)
         break;
 
       case EEVEE_MOTION_DATA_MESH:
+        if (mb_geom->batch != NULL) {
+          for (int i = 0; i < GPU_BATCH_VBO_MAX_LEN; i++) {
+            if (mb_geom->batch->verts[i] == mb_geom->vbo[MB_PREV] ||
+                mb_geom->batch->verts[i] == mb_geom->vbo[MB_NEXT]) {
+              /* Avoid double reference of the VBOs. */
+              mb_geom->batch->verts[i] = NULL;
+            }
+          }
+        }
         GPU_VERTBUF_DISCARD_SAFE(mb_geom->vbo[MB_PREV]);
         mb_geom->vbo[MB_PREV] = mb_geom->vbo[MB_NEXT];