Cycles: Fix bvh2 gen on Apple Silicon and use it to speed up renders

This patch fixes a correctness issue discovered in the `int4 select(...)` function on Apple Silicon machines, which causes bad bvh2 builds. Although the generated bvh2s give correct renders, the resulting runtime performance is terrible. This fix allows us to switch over to bvh2 on Apple Silicon giving a significant performance uplift for many of the standard benchmarking assets. It also fixes some unit test failures stemming from the use of MetalRT, and trivially enables the new pointcloud primitive.

Ref T92212

Reviewed By: brecht

Maniphest Tasks: T92212

Differential Revision: https://developer.blender.org/D13877

1 files changed, 0 insertions, 3 deletions

diff --git a/intern/cycles/device/metal/device_impl.mm b/intern/cycles/device/metal/device_impl.mm
index 5906da3680b..17acb2c94e4 100644
--- a/intern/cycles/device/metal/device_impl.mm
+++ b/intern/cycles/device/metal/device_impl.mm
@@ -87,17 +87,14 @@ MetalDevice::MetalDevice(const DeviceInfo &info, Stats &stats, Profiler &profile
     default:
       break;
     case METAL_GPU_INTEL: {
-      use_metalrt = false;
       max_threads_per_threadgroup = 64;
       break;
     }
     case METAL_GPU_AMD: {
-      use_metalrt = false;
       max_threads_per_threadgroup = 128;
       break;
     }
     case METAL_GPU_APPLE: {
-      use_metalrt = true;
       max_threads_per_threadgroup = 512;
       break;
     }