CGTalk - Ray Marching Falloff expression ??

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andy gee

04-14-2008, 06:19 PM

Hi everybody

I have just read the tutorial from the archives on Ray Marching, and I just wanted to ask a question about it if thats okay with everybody who posted to that subject.

Is there an expression I could write that will give a gradient falloff of the light shafts ?

I know that if you increase or decrease the threshold of the physical light It shorten or lengthens the rays But I want a nice linear falloff from bright to dark.

Anybody got any ideas on this ?

Thanks

Andy Gee

Sharky0815

04-15-2008, 09:03 AM

Could you post a link to the tutorial you are talking about?

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