Add a method to initialize the node material for post process editing

src/Materials/Node/nodeMaterial.ts

@@ -1206,6 +1206,51 @@ export class NodeMaterial extends PushMaterial {
     }
 
     /**
+     * Clear the current material and set it to a default state for post process
+     */
+    public setToDefaultPostProcess() {
+        this.clear();
+
+        this.editorData = null;
+
+        const position = new InputBlock("Position");
+        position.setAsAttribute("position2d");
+
+        const const1 = new InputBlock("Constant1");
+        const1.isConstant = true;
+        const1.value = 1;
+
+        const vmerger = new VectorMergerBlock("Position3D");
+
+        position.connectTo(vmerger);
+        const1.connectTo(vmerger, { input: "w" });
+
+        const vertexOutput = new VertexOutputBlock("VertexOutput");
+        vmerger.connectTo(vertexOutput);
+
+        // Pixel
+        const scale = new InputBlock("scale");
+        scale.visibleInInspector = true;
+        scale.value = new Vector2(1, 1);
+
+        const uv0 = new RemapBlock("uv0");
+        position.connectTo(uv0);
+
+        const uv = new MultiplyBlock("uv");
+        uv0.connectTo(uv);
+        scale.connectTo(uv);
+
+        const currentScreen = new CurrentScreenBlock("CurrentScreen");
+        uv.connectTo(currentScreen);
+
+        var fragmentOutput = new FragmentOutputBlock("FragmentOutput");
+        currentScreen.connectTo(fragmentOutput, { output: "rgba" });
+
+        // Add to nodes
+        this.addOutputNode(vertexOutput);
+        this.addOutputNode(fragmentOutput);
+
+        this._mode = NodeMaterialModes.PostProcess;
     }
 
     /**