replacing background in post

[s_gru]

hello. wha't a good approach using GPU rendering and replacing the background in post processing?

i have attached an image that shows some 3d trees in my scene with a halo around them. what i did is render the image with a vray dome light with HDRI map for lighting. then i saved as a 16bit tif file with alpha channel. opened this in photoshop, dragged an image in (new background) and used a mask create from the stored alpha in the render.

i'm wondering how to get rid of the halo. thanks.

[fixeighted]

Black environment and make the dome invisible should do the trick

[s_gru]

bingo. damn using vray is nice. even with gpu you can do a ton of the old tricks that i couldn't due to using a different gpu renderer.

[fixeighted]

Hehe, cool. Yes Vray is rather good at what it does