Subject:
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Re: How would you do it?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Thu, 2 Jun 2011 12:10:32 GMT
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Viewed:
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20824 times
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In lugnet.cad.ray, Larry Pieniazek wrote:
> A long time ago, Jeroen kindly rendered this image for me in POVRay
>
> http://miltontrainworks.com/MTW/images/MTWproductLine_1280x1024.jpg
>
> But the source got lost. Now I need it much much larger so I'm trying to
> recreate it. I am all the way there (all models positioned right, etc) except
> for the lighting/shadows. Which may well be the hardest part!
>
> I like how the shadows are, they are relatively light. I also like how the base
> reflection is set up (i.e. there is none)
>
> I've been trying a lot of different render settings and surface settings but I'm
> either getting large muddy shadows, or I'm getting a surface that reflects the
> models. Anyone have any clues on the best combination of surface materials (for
> the white plane that everything sits on) and light source settings? I thought
> maybe an area light was the way to go but it's not working well for me.
>
> Here's my current surface settings...
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> texture {
> pigment{ rgb <1,1,1> }
> finish {
> reflection 0
> ambient 0.4
> diffuse 0.5
> roughness .01
> }
> }
>
> Am I even on the right track there?
>
> Thanks for any suggestions.
Hi Larry,
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). I'd guess the light source is
very far away (to simulate sunlight) because all the shadows cast proportionate
lengths.
To soften the shadows I'd think you would want to increase ambient and
diminish diffuse. The affect of diffuse depends on the angle of the light
hitting the surface, ambient is not. If you have control over ambient light
color I'd guess you want it white.
I'd practice on the lighting/background on a small model until you get what
you want but you're very smart, so you probably are already doing that. It
might also be faster to render each model separately, and then composite them
together into your final image.
Kevin
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Message has 2 Replies:
 | | Re: How would you do it?
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| (...) 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)
| | | Re: How would you do it?
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| (...) I am considering using parallel instead of a light source that's very far away... I don't think Jeroen used "parallel" for his source(s) because the shadow angles are steeper in the foreground. (this will be less pronounced with light sources (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)
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Message is in Reply To:
| | How would you do it?
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| A long time ago, Jeroen kindly rendered this image for me in POVRay (URL) the source got lost. Now I need it much much larger so I'm trying to recreate it. I am all the way there (all models positioned right, etc) except for the lighting/shadows. (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)
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