Gaussian Blur |Post Processing Bloom| MultiPass Rendering in jpct ae

[EgonOlsen]

Cool!

[AeroShark333]

I was just wondering about this multipass rendering thing...
Is it not possible to use one single rendertarget for multipass rendering? (so with every pass the rendertarget is used for blitting)
I wonder why in this thread at least 2 rendertarget textures were needed.

In this thread:
Render world into rendertarget1.
Blit rendertarget1 into rendertarget2 (with blit shader 1)
Blit rendertarget2 into the normal framebuffer (with blit shader 2)

But why not just this?:
Render world into rendertarget1.
Blit rendertarget1 into rendertarget1 (with blit shader 1)
Blit rendertarget1 into the normal framebuffer (with blit shader 2)

I kind of tried the second method but it didn't really work...
Though I wonder why it didn't work

[EgonOlsen]

You can't use the an input buffer as an output buffer at the same time.