Is there a public API or recommend way to get a camera's colorBuffer?

[FBplus]

Hi,@mvaligursky ,thanks so much for your reply

I am trying to make a bloom effect only on specific objects according your advice here:

Apply Bloom only to specific Materials

Perhaps this callback on UI layer could be used. https://developer.playcanvas.com/en/api/pc.Layer.html#onPreRender Blend texture to framebuffer … this basically means to render full screen quad using the bloomed textured. As an example you can study post processing effects, such as bloom … they internally render multiple full screen passes for blurring the texture. So you’d need something similar. And also I’ve relalized … if you only render few objects into the bloom texture and bloom that,…

So I have to capture the camera’s colorbuffer before the bloom objects is rendered. I’ve managed to achieve that effect but wonder if there is any better solution?
I’ve tried to use texture_grabPass to replace camera.postEffects._sourceTarget.colorBuffer,but I can not capture anything,Is there any pre setup need to be done?

The test project can be found here:
https://playcanvas.com/project/773988/overview/selective-bloom