Fix #35807: blender internal motion blur render without antialiasing would

give black speckles (self intersection errors) in raytraced shadows.

Motion blur does some extra offsets for free antialiasing in the motion blur
samples, but did not take them into account everywhere.

2 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/render/intern/source/shadeinput.c b/source/blender/render/intern/source/shadeinput.c
index eb9e72fedfa..2dcb55f1f5d 100644
--- a/source/blender/render/intern/source/shadeinput.c
+++ b/source/blender/render/intern/source/shadeinput.c
@@ -1416,6 +1416,10 @@ void shade_samples_fill_with_ps(ShadeSample *ssamp, PixStr *ps, int x, int y)
 					xs = (float)x + R.samples->centLut[b & 15] + 0.5f;
 					ys = (float)y + R.samples->centLut[b >> 4] + 0.5f;
 				}
+				else if (R.i.curblur) {
+					xs= (float)x + R.mblur_jit[R.i.curblur-1][0] + 0.5f;
+					ys= (float)y + R.mblur_jit[R.i.curblur-1][1] + 0.5f;
+				}
 				else {
 					xs = (float)x + 0.5f;
 					ys = (float)y + 0.5f;
diff --git a/source/blender/render/intern/source/zbuf.c b/source/blender/render/intern/source/zbuf.c
index b974022790d..2f45ad756d3 100644
--- a/source/blender/render/intern/source/zbuf.c
+++ b/source/blender/render/intern/source/zbuf.c
@@ -3824,6 +3824,10 @@ static void shade_tra_samples_fill(ShadeSample *ssamp, int x, int y, int z, int
 				xs= (float)x + R.samples->centLut[b & 15] + 0.5f;
 				ys= (float)y + R.samples->centLut[b>>4] + 0.5f;
 			}
+			else if (R.i.curblur) {
+				xs= (float)x + R.mblur_jit[R.i.curblur-1][0] + 0.5f;
+				ys= (float)y + R.mblur_jit[R.i.curblur-1][1] + 0.5f;
+			}
 			else {
 				xs= (float)x + 0.5f;
 				ys= (float)y + 0.5f;