Fixed pass chaining for Bloom and God Rays.

The needsSwap flag still feels rather awkward. In fact, most passes
render to the write buffer. Maybe this intention can be detected
differently.

Author: vanruesc

src/passes/bloom.js

@@ -33,6 +33,12 @@ export class BloomPass extends Pass {
 
 		this.name = "BloomPass";
 
+		/**
+		 * This pass renders to the write buffer.
+		 */
+
+		this.needsSwap = true;
+
 		/**
 		 * A blur pass.
 		 *

src/passes/god-rays.js

@@ -65,6 +65,12 @@ export class GodRaysPass extends Pass {
 
 		this.name = "GodRaysPass";
 
+		/**
+		 * This pass renders to the write buffer.
+		 */
+
+		this.needsSwap = true;
+
 		/**
 		 * A scene that only contains the light source.
 		 *