From c30c6b2d4e5b0a2490af0ce865032e03605ab44f Mon Sep 17 00:00:00 2001
From: Michael Jones <michael_p_jones@apple.com>
Date: Thu, 9 Nov 2023 22:23:37 +0100
Subject: [PATCH] Cycles: Fix Metal API validation error when Metal motion blur
 workaround is applied

Following #114544: When running with Metal API validation enabled, allocating a zero-sized buffer results in validation errors. This silences that.

Pull Request: https://projects.blender.org/blender/blender/pulls/114680
---
 intern/cycles/device/metal/bvh.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/intern/cycles/device/metal/bvh.mm b/intern/cycles/device/metal/bvh.mm
index 45780b4f166..6e753688c1b 100644
--- a/intern/cycles/device/metal/bvh.mm
+++ b/intern/cycles/device/metal/bvh.mm
@@ -976,7 +976,7 @@ bool BVHMetal::build_TLAS(Progress &progress,
         storage_mode = MTLResourceStorageModeShared;
       }
 
-      id<MTLBuffer> nullBuf = [device newBufferWithLength:0 options:storage_mode];
+      id<MTLBuffer> nullBuf = [device newBufferWithLength:sizeof(float3) options:storage_mode];
 
       /* Create an acceleration structure. */
       MTLAccelerationStructureTriangleGeometryDescriptor *geomDesc =