Update CHANGELOG.md

Author: photonstorm

CHANGELOG.md

@@ -198,6 +198,7 @@ one set of bindings ever created, which makes things a lot cleaner.
 * `TextureTintPipeline.flush` and `TextureTintPipeline.pushBatch` have been optimized to handle zero based texture units as priority. They've also been refactored to avoid creation of empty texture batches.
 * The `WebGLRenderer.setTexture2D` method has a new optional argument `flush` which controls if the pipeline is flushed if the given texture is new, or not. This is used internally to skip flushing during an existing flush.
 * The Tilemap Layer `width` and `height` properties are now based on the tilemap tile sizes multiplied by the layer dimensions. This corrects an issue with layer sizes being wrong if you called `setBaseTileSize` on a Map.
+* The WebGLRenderer will now clear the framebuffer at the start of every render.
 
 ### Bug Fixes
 
@@ -238,6 +239,9 @@ one set of bindings ever created, which makes things a lot cleaner.
 * Changing `scaleX` or `scaleY` on a `MatterImage` or `MatterSprite` would cause the body scale to become distorted as the setters didn't use the correct factor when resetting the initial scale. Fix #4206 (thanks @YannCaron)
 * `StaticBody.reset` in Arcade Physics would ignore the `x` and `y` values given to it. If given, they're now used to reset the parent Game Object before the body is updated. Fix #4224 (thanks @samme)
 * Static Tilemap Layers wouldn't render correctly if the layer used a tileset with a different size to the base map data (set via `setBaseTileSize`). They now render correctly in WebGL and Canvas, regardless of the base tile size.
+* When using `RenderTexture.fill`, the `alpha` argument would be ignored in Canvas mode. It's now used when filling the RenderTexture.
+* Fixed an issue in `WebGLRenderer.setScissor` where it was possible to try and compare the scissor size to a non-current scissor, if called outside of the render loop (i.e. from `RenderTexture.fill`)
+* `RenderTexture.fill` in WebGL would use `gl.clear` and a clear color to try and fill the Render Texture. This only worked for full-canvas sized RenderTextures that didn't have a camera zoom applied. It has now been swapped to use the `drawFillRect` method of the Texture Tint Pipeline, allowing it to work properly regardless of camera zoom or size.
 
 ### Examples and TypeScript