diff --git a/modules/extensions/src/terrain/terrain-picking-pass.ts b/modules/extensions/src/terrain/terrain-picking-pass.ts
index 95cf5f53079..7cb62c25bec 100644
--- a/modules/extensions/src/terrain/terrain-picking-pass.ts
+++ b/modules/extensions/src/terrain/terrain-picking-pass.ts
@@ -85,7 +85,9 @@ export class TerrainPickingPass extends PickLayersPass {
   }
 
   getShaderModuleProps(layer: Layer, effects: any, otherShaderModuleProps: Record<string, any>) {
+    const base = super.getShaderModuleProps(layer, effects, otherShaderModuleProps);
     return {
+      ...base,
       terrain: {
         project: otherShaderModuleProps.project
       }