How can I create a texture using EffectComposer

[bliny]

Hello,

I'm trying to create a texture from what EffectComposer renders.

To make it easier I created a demo here:
https://playcode.io/1668684

There are 2 functions

• renderFromSecondaryScreenWithRenderer(renderer, scene) This creates a texture and puts it in the left corner, the green and pink square
• renderFromSecondaryScreenWithEffectPass(renderer, scene) This should create the same image but in the right corner

And 1 more thing, adding EffectPass removes the background, if you comment out the renderFromSecondaryScreenWithEffectPass function call the spinning square background changes, why?

I have no idea what I'm messing up, any help would be appreciated.
Thanks