koobas.hobune.stream
Refraction - GrabPass in Forward Rendering
Hi,
I am trying to create a refraction effect in Unity 4 Pro. First, I use GrabPass for a simple transparency effect. Next, I will apply the bump refraction effect. But I have some questions.
What is the difference between the two GrabPass syntax ? GrabPass { } and GrabPass { "TextureName" }. I don't get why one is optimized and the other isn't.
Another important question is why GrabPass doesnt work in forward rendering ? Is there a way to implement GrabPass in forward rendering ?
Thanks a lot for your answers !
GrabPass doesn't work in forward, because forward is stupid, slow and should be depricated! Just my opinion, but thats mostly the reason :P
Thanks for your answer ! :D But maybe you could develop in a more technical way ? $$anonymous$$aybe it's offtopic but why do you consider forward rendering "depricated" ?
Because forward rendering is inferior to differed in every way. There is no need for both, so the better should triumph, therefore forward is depricated :)
It seems that it is possible to use GrabPass with Forward but it needs to be rendered last.
But even if I change de RenderQueue greater than Geometry, the GrabPass Texture seems to be empty. Any ideas ?
[EDIT] My bad, if you change the RenderQueue in the SubShader it works.
Thanks !
