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 CAD / Ray-Tracing / 3039
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Subject: 
Re: How would you do it?
Newsgroups: 
lugnet.cad.ray
Date: 
Thu, 2 Jun 2011 19:37:35 GMT
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In lugnet.cad.ray, Anders Isaksson wrote:
Kevin L. Clague wrote:
I'm not much of a POV expert, but it looks to me like Jeroen used a
single light source (I only see one shadow per model).

You can use many lights, and still have a single shadow by making all lights
but one 'shadowless' (a modifier to the POV light description). I often put
a (not too bright) shadowless light at the same position as the camera, to
make sure there's at least *some* light into all the cavities you can see.

How bright is "not too bright"? These lights don't obey the r**2 law like real lights do, right? I noticed that if I have several rgb<1,1,1> lights the scene seems "overilluminated"   Do you use .5 or so for the not too bright ones?



Message has 1 Reply:
  Re: How would you do it?
 
(...) Actually, the sum of *all* your lights should not be too much over <1,1,1> as some parts of the image may be saturated. I usually use 0.5-0.7 for the *brightest* light, and 0.1-0.3 for filler lights. Remember it's easy to modify light (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)

Message is in Reply To:
  Re: How would you do it?
 
(...) You can use many lights, and still have a single shadow by making all lights but one 'shadowless' (a modifier to the POV light description). I often put a (not too bright) shadowless light at the same position as the camera, to make sure (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)

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