Ensure vulkan subgroups are disabled for MoltenVK

We found they don't work on intel macbooks properly at all.

Possible future solutions:
- update to moltenvk.
- update to spirv may resolve it.

1 files changed, 2 insertions, 1 deletions

diff --git a/servers/rendering/renderer_rd/shaders/cluster_render.glsl b/servers/rendering/renderer_rd/shaders/cluster_render.glsl
index 2fe230f0bf..932312de82 100644
--- a/servers/rendering/renderer_rd/shaders/cluster_render.glsl
+++ b/servers/rendering/renderer_rd/shaders/cluster_render.glsl
@@ -64,7 +64,7 @@ void main() {
 #version 450
 
 #VERSION_DEFINES
-
+#ifndef MOLTENVK_USED // Metal will corrupt GPU state otherwise
 #if defined(has_GL_KHR_shader_subgroup_ballot) && defined(has_GL_KHR_shader_subgroup_arithmetic) && defined(has_GL_KHR_shader_subgroup_vote)
 
 #extension GL_KHR_shader_subgroup_ballot : enable
@@ -73,6 +73,7 @@ void main() {
 
 #define USE_SUBGROUPS
 #endif
+#endif
 
 layout(location = 0) in float depth_interp;
 layout(location = 1) in flat uint element_index;