Putting sky behind and jagged areas.

[berez]

Hi guys

 

Recently I was trying to add a nice sky to my render that I saved as .png with alpha channel. Unfortunately there was was something that destroyed the whole effects - over burn and jagged edges of my render. How to avoid them and where they come from???

[Ismael]

http://forums.cgarchitect.com/70822-im-having-problem-my-vray-sky-glass-material.html

[berez]

thanks.

I see that mostly this bug was caused by image filter (Catmull-Rom)

Anyway in some parts of my render always will get a value over 1 !

It doesn't look good anyway when I try to put a sky behind a render and the target-sky has a different color from white....

 

To fight this problems I've tried out 32-bit .vrimg and it can amazingly get back information from over-burn areas.

BUT ! this format doesn't remember alpha channel (like .png does)

Is there is anyway to force it to generate automatically a render without background?

or maybe some efficient way of applying alpha channel as render pass?

[RyderSK]

Yes, try rendering without background visible (against black color). Should help out quite some.

[berez]

what do you mean by background? enviroment slot?

[berez]

wow it works, thanks man !