I'm running a heavily modded Cocos2D version with support for all iOS 9+ devices.
What's odd is that whenever I use a content scaling factor of 3 or 4 anything rendered to a render texture node looks weird, but for x2 and x1 I don't see the issue. Everything else renders fine though – including fonts and normal textures.
There is one thing though: by necessity I'm using downsampling by adjusting viewport and winSize. The render texture issue also looks better when I force antialias on it. Is this the core issue of my problem? That I should be running antialias on the render texture by default?