From bbb1f900dde8f2a89bffcaa709cb53b35f05f92c Mon Sep 17 00:00:00 2001
From: Anders Stenberg <495668+SonnyBonds@users.noreply.github.com>
Date: Sat, 22 Oct 2022 12:27:13 +0200
Subject: Fix cluster_render.glsl failing on some Macs Some Macs encounter an
 internal error when compiling cluster_render.glsl caused by a likely bug in
 the MVK/Metal compiler when using gl_HelperInvocation.

---
 servers/rendering/renderer_rd/shaders/cluster_render.glsl | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/servers/rendering/renderer_rd/shaders/cluster_render.glsl b/servers/rendering/renderer_rd/shaders/cluster_render.glsl
index 2fe230f0bf..8e1888d314 100644
--- a/servers/rendering/renderer_rd/shaders/cluster_render.glsl
+++ b/servers/rendering/renderer_rd/shaders/cluster_render.glsl
@@ -141,7 +141,11 @@ void main() {
 		}
 	}
 #else
-	if (!gl_HelperInvocation) {
+// MoltenVK/Metal fails to compile shaders using gl_HelperInvocation for some GPUs
+#ifndef MOLTENVK_USED
+	if (!gl_HelperInvocation)
+#endif
+	{
 		atomicOr(cluster_render.data[usage_write_offset], usage_write_bit);
 	}
 #endif
@@ -161,7 +165,11 @@ void main() {
 		}
 	}
 #else
-	if (!gl_HelperInvocation) {
+// MoltenVK/Metal fails to compile shaders using gl_HelperInvocation for some GPUs
+#ifndef MOLTENVK_USED
+	if (!gl_HelperInvocation)
+#endif
+	{
 		atomicOr(cluster_render.data[z_write_offset], z_write_bit);
 	}
 #endif
-- 
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