Make the node material raise the "on effect created" event

src/Materials/Node/nodeMaterial.ts

@@ -29,6 +29,9 @@ import { TextureBlock } from './Blocks/Dual/textureBlock';
 import { ReflectionTextureBlock } from './Blocks/Dual/reflectionTextureBlock';
 import { EffectFallbacks } from '../effectFallbacks';
 import { WebRequest } from '../../Misc/webRequest';
+import { Effect } from '../effect';
+
+const onCreatedEffectParameters = { effect: null as unknown as Effect, subMesh: null as unknown as Nullable<SubMesh> };
 
 // declare NODEEDITOR namespace for compilation issue
 declare var NODEEDITOR: any;
@@ -818,6 +821,12 @@ export class NodeMaterial extends PushMaterial {
             }, engine);
 
             if (effect) {
+                if (this._onEffectCreatedObservable) {
+                    onCreatedEffectParameters.effect = effect;
+                    onCreatedEffectParameters.subMesh = subMesh;
+                    this._onEffectCreatedObservable.notifyObservers(onCreatedEffectParameters);
+                }
+
                 // Use previous effect while new one is compiling
                 if (this.allowShaderHotSwapping && previousEffect && !effect.isReady()) {
                     effect = previousEffect;