attempt ultimit jank to fix shader

src/main/resources/assets/voxy/shaders/util/prefixsum/inital3.comp

@@ -92,11 +92,18 @@ void main() {
         memoryBarrierShared();
         barrier();
 
+
+        //hate amd hate amd hate amd hate amd
+
+        uint val = warpPrefixSum[gl_LocalInvocationID.x&3u];
+
+        subgroupBarrier();
+        //Use warp to do entire add in 1 reduction
+        uint extraJank = subgroupExclusiveAdd(val);
+
+        barrier();
         if (gl_LocalInvocationID.x<4) {
-            uint val = warpPrefixSum[gl_SubgroupInvocationID];
+            warpPrefixSum[gl_LocalInvocationID.x] = extraJank;
-            subgroupBarrier();
-            //Use warp to do entire add in 1 reduction
-            warpPrefixSum[gl_SubgroupInvocationID] = subgroupExclusiveAdd(val);
         }
 
         memoryBarrierShared();