Global Illumination - Infinite Backdrop

[nouman-khan]

hi all! Does anyone have the slightest idea how to create an 'infinite' background for Global Illumination scene? I created a constant material sphere to transmit light onto my scene. I then turned off primary rays, so that i couldnt see it. everything looks great in the render, except you can see when the floor connects to the hidden sphere. i want to make it look like it keeps on going, blending into the sky, creating an infinite effect. heres an example of what i mean:
http://www.3dluvr.com/pepeland/3D%20Gallery2%20-%2003.htm

derek

[atyss]

It"s so easy

First, make your ground and dome very big.
Then, add depth fading, that starts before the dome, and end before the floor border. Set the depth fading color to be the same as the floor.

Hope this helps
Salutations - Cheers
Bernard Lebel

[nouman-khan]

hmm. depth fading huh? cant say i thought of that. ive never used it before. do you think you can be a little more clear on what you mean? also, is it possible to render just shadows using global illumination?
thanks a bunch!

derek

[atyss]

Basically, depth fading is a fog effect.
You will find it in Matter > Atmosphere > Depth Fading.
Check Depth Fading.
The other parameters are very simple (read my instructions in my previouw post).

As for shadows and global illumination, you should try rendering with primary rays for shadow casting objects turned off.

Hope this helps
Salutations - Cheers
Bernard Lebel

[moss]

Turn off shadows as well on the dome and make it bigger than the floor.

Astro