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 CAD / Ray-Tracing / *3041 (-20)
  Re: How would you do it?
 
(...) If I understand it correctly, 'ambient' is what you see if all lights are off. I usually turn this down very low (zero). 'Diffuse' is reflected light from other surfaces, you'd want quite a lot of that. (...) Yes, I think the default (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)
 
  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)
 
  Re: How would you do it?
 
(...) 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? (13 years ago, 2-Jun-11, to lugnet.cad.ray)  
 
  Re: How would you do it?
 
(...) 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)
 
  Re: How would you do it?
 
(...) Looking at the lighting, I'm pretty sure he used radiosity and prolly his FastRad library. I might still have a copy lemme poke around. -Orion (13 years ago, 2-Jun-11, to lugnet.cad.ray)
 
  Re: How would you do it?
 
(...) I'm 99++% certain that's not the case, given the input data Jeroen was able to recover for me. I think removing reflections would be a lot of work, better to change the properties of the surface to get them not to happen. (13 years ago, 2-Jun-11, to lugnet.cad.ray)
 
  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)
 
  Re: How would you do it?
 
It looks to me like each model / row of models was rendered in POV-Ray individually and then PhotoShopped together. Probably removed any reflections when combined on to one image. Scott (13 years ago, 2-Jun-11, to lugnet.cad.ray)
 
  Re: How would you do it?
 
(...) 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 (...) (13 years ago, 2-Jun-11, to lugnet.cad.ray)
 
  How would you do it?
 
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)  
 
  Re: POVRay Error: lg_defs.inc
 
(...) The bug in LDView means that any sloped bricks that have LGEO versions won't work if they use a color not directly supported by LGEO. Your model used color 0x6FFFFFF (which is transparent full white) for at least one brick that contained a (...) (13 years ago, 26-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
Travis, cool, many thanks, will be able to test the file tomorrow. What can I do within LDraw to avoid this prob in future times? Thx, adrian (13 years ago, 26-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
(...) I got your email, tracked down the problem, and sent you a link to a test LDView build. Thanks again. For reference, LDView was referring to sloped brick faces using LGEO's _slope variant of the color even when the color wasn't a color (...) (13 years ago, 26-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
(...) You're welcome. I got the POV files, and responded (via email) that I needed the original LDraw file in order to debug LDView. It would seem that you didn't get my email reply. --Travis (13 years ago, 25-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
Hi Travis, thanks for your offer, I sent you the file yesterday evening (european time :-) ). cheers, adrian (13 years ago, 25-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
(...) That sounds like an LDView bug. If you send me your model, I will investigate. --Travis (13 years ago, 23-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
Hi, I tried the installation, works fine, but get same error as with the tip of Larry: "No matching in 'material', undeclared identifier 'LDXColor117440511_slope'" Any idea? Thx, adrian (13 years ago, 23-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
Hi Larry, no, Ben wasn't there, I forgot the name of the guy you've visited, I will ask Ralph, maybe he remembers. Your tip with the library path helped a bit, the error I asked about doesn't show up again, but now there is a new one: "No matching (...) (13 years ago, 23-May-11, to lugnet.cad.ray)
 
  Re: POVRay Error: lg_defs.inc
 
(...) I am the Larry behind MiltonTrainWorks.com ... and I think I have been the Larry you met in Germany way long ago. Was Ben there? (13 years ago, 18-May-11, to lugnet.cad.ray)  
 
  Re: POVRay Error: lg_defs.inc
 
Hy Larry, I am also going to try this on friday, thx. BTW, are you THE Larry I have met years years years ago for one day in Germany (forgot the name of the boy you visited, I have been there with Dö (Ralph)) and built some cool stuff together? Some (...) (13 years ago, 18-May-11, to lugnet.cad.ray)


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