@@ 94,6 94,8 @@ SECTOR_CAPACITY := MAX_CASCADE_DEPTH * 1
 CASCADE_SIZE := (1 << MAX_CASCADE_DEPTH)
 CASCADE_CENTER := (CASCADE_SIZE // 2)
 
+InstanceVertexCount := 4
+
 let BINDING_BUF_SECTOR_IN = 1
 let BINDING_BUF_SECTOR_INOUT = 2
 let BINDING_BUF_VERTEX_IN = 3

          
@@ 1142,10 1144,10 @@ fn generate-quad (v00 v01 v10 v11)
             _ v00 v10 v11 v01
 
     # generate quad
-    let ofs = (atomicAdd vertex-out.count 6)
+    let ofs = (atomicAdd vertex-out.count 4)
     sector := (sector-inout.keys @ gl_WorkGroupID.x)
     atomicMin sector.offset-min ofs
-    atomicMax sector.offset-max (ofs + 6)
+    atomicMax sector.offset-max (ofs + 4)
     entries := vertex-out.entries
     static-if USE_FLAT_SHADING
         n0 := (triangle-normal v00.pos v11.pos v10.pos)

          
@@ 1153,18 1155,16 @@ fn generate-quad (v00 v01 v10 v11)
         #n1 := (normal v00.pos v11.pos v01.pos)
 
         entries @ (ofs + 0) = (swapnormal v00 n0)
-        entries @ (ofs + 1) = (swapnormal v10 n0)
+        entries @ (ofs + 1) = (swapnormal v10 n1)
         entries @ (ofs + 2) = (swapnormal v11 n0)
-        entries @ (ofs + 3) = (swapnormal v11 n1)
-        entries @ (ofs + 4) = (swapnormal v01 n1)
-        entries @ (ofs + 5) = (swapnormal v00 n1)
+        #entries @ (ofs + 3) = (swapnormal v11 n1)
+        entries @ (ofs + 3) = (swapnormal v01 n1)
+        #entries @ (ofs + 5) = (swapnormal v00 n1)
     else
         entries @ (ofs + 0) = v00
         entries @ (ofs + 1) = v10
         entries @ (ofs + 2) = v11
-        entries @ (ofs + 3) = v11
-        entries @ (ofs + 4) = v01
-        entries @ (ofs + 5) = v00
+        entries @ (ofs + 3) = v01
     ;
 
 let

          
@@ 1480,7 1480,8 @@ inout depthval : f32
 inout albedo : vec4
 inout matdata : vec4
 fn rasterize-vert ()
-    let vertex-index = ((deref gl_VertexID) as u32)
+    #let vertex-index = ((deref gl_VertexID) as u32)
+    vertex-index := gl_InstanceID * InstanceVertexCount + gl_VertexID
     let vin = (deref (vertex-in.entries @ vertex-index))
     let coord = (vec3 vin.pos.xyz)
     let lod = (vin.pos.w as f32)

          
@@ 1990,8 1991,8 @@ inline main ()
         indirect-draw-arrays-setup
             inline ()
                 _
-                    deref vertex-in.count
-                    1
+                    InstanceVertexCount
+                    (deref vertex-in.count) // InstanceVertexCount
                     0
                     0
 

          
@@ 2022,7 2023,9 @@ inline main ()
 
             GL.UseProgram pg-rasterize
             GL.BindVertexArray vao-empty
-            exec-draw-arrays GL.TRIANGLES
+            #exec-draw-arrays GL.TRIANGLES
+            exec-draw-arrays GL.TRIANGLE_FAN
+            #exec-draw-arrays GL.TRIANGLE_LINES
 
             GL.Disable GL.DEPTH_TEST
             GL.Disable GL.CULL_FACE