1 files changed, 4 insertions, 3 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_transparent_accum_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_transparent_accum_frag.glsl
index 213279b1913..cd5ac21688c 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_transparent_accum_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_transparent_accum_frag.glsl
@@ -6,7 +6,7 @@
 #pragma BLENDER_REQUIRE(workbench_world_light_lib.glsl)
 
 /* Special function only to be used with calculate_transparent_weight(). */
-float linear_zdepth(float depth, vec4 viewvecs[2], mat4 proj_mat)
+float linear_zdepth(float depth, mat4 proj_mat)
 {
   if (proj_mat[3][3] == 0.0) {
     float d = 2.0 * depth - 1.0;
@@ -14,7 +14,8 @@ float linear_zdepth(float depth, vec4 viewvecs[2], mat4 proj_mat)
   }
   else {
     /* Return depth from near plane. */
-    return depth * viewvecs[1].z;
+    float z_delta = -2.0 / proj_mat[2][2];
+    return depth * z_delta;
   }
 }
 
@@ -24,7 +25,7 @@ float linear_zdepth(float depth, vec4 viewvecs[2], mat4 proj_mat)
  */
 float calculate_transparent_weight(void)
 {
-  float z = linear_zdepth(gl_FragCoord.z, drw_view.viewvecs, drw_view.winmat);
+  float z = linear_zdepth(gl_FragCoord.z, drw_view.winmat);
 #if 0
   /* Eq 10 : Good for surfaces with varying opacity (like particles) */
   float a = min(1.0, alpha * 10.0) + 0.01;