diff --git a/src/mol-canvas3d/helper/postprocessing.ts b/src/mol-canvas3d/helper/postprocessing.ts
index e47c803b8e3e1167bf5f8d6da1370ba3d0aeeeaa..3b476365a228b3ac3c2e0c3d446d1e6546671c37 100644
--- a/src/mol-canvas3d/helper/postprocessing.ts
+++ b/src/mol-canvas3d/helper/postprocessing.ts
@@ -33,7 +33,7 @@ const PostprocessingSchema = {
 
 export const PostprocessingParams = {
     occlusionEnable: PD.Boolean(false),
-    occlusionKernelSize: PD.Numeric(4, { min: 1, max: 100, step: 1 }),
+    occlusionKernelSize: PD.Numeric(4, { min: 1, max: 32, step: 1 }),
     occlusionBias: PD.Numeric(0.5, { min: 0, max: 1, step: 0.01 }),
     occlusionRadius: PD.Numeric(64, { min: 0, max: 256, step: 1 }),