source/blender/draw/engines/workbench/shaders/workbench_volume_frag.glsl

@@ -209,6 +209,12 @@ vec4 volume_integration(vec3 ray_ori, vec3 ray_dir, float ray_inc, float ray_max
     /* accumulate and also take into account the transmittance from previous steps */
     final_scattering += final_transmittance * Lscat;
     final_transmittance *= Tr;
+
+    if (final_transmittance <= 0.01) {
+      /* Early out */
+      final_transmittance = 0;
+      break;
+    }
   }
 
   return vec4(final_scattering, final_transmittance);