Guest penguin71 Posted August 13, 2002 Share Posted August 13, 2002 PLEASE can someone tell me why VIZ4 doesn't give the specular on the material it is my error? I tried with radiosity ovverride material but nothing PALMIRO or something else please help me Bye from Stefano Link to comment Share on other sites More sharing options...
nisus Posted August 13, 2002 Share Posted August 13, 2002 Hi stefano, What do you mean exactly? Are you using standard or *RT materials? rgds nisus *RT: raytraced Link to comment Share on other sites More sharing options...
Guest penguin71 Posted August 13, 2002 Share Posted August 13, 2002 Hi Nisus I mean the normal specular highlight on an object like in scanline render. I used the standard material but there is no specular on the objects If you know this problem please help me Bye Stefano Link to comment Share on other sites More sharing options...
plastic Posted August 13, 2002 Share Posted August 13, 2002 you can use an omni light that only affects specularity, to simulate it when using GI. remember that the max specular highlights are no physically correct approach. radiosity simulates real-world lighting. to get real specular reflections/highlights you have to use raytracing and very bright object-lights or hdr-images. read this article: http://www.neilblevins.com/cg_education/metal_and_refs/metal_and_refs.htm Link to comment Share on other sites More sharing options...
nisus Posted August 13, 2002 Share Posted August 13, 2002 Hi stefano, I need more information on your file. Did you check the highlight button in the sun settings? What shader are you using? ... Can you post your file? rgds nisus Link to comment Share on other sites More sharing options...
Guest penguin71 Posted August 13, 2002 Share Posted August 13, 2002 Hey NIsus thanks for the reply I could send an image sample but I don't know a site where to send it If you know where and how please tell me I need help I must produce work for a portfolio BYe from Stefano ITALIA Link to comment Share on other sites More sharing options...
Guest penguin71 Posted September 1, 2002 Share Posted September 1, 2002 Is it possible that a programm like VIZ4 after you have calculated the radiosity and launch the render give the material without specular highlights. Noone can tell me where I'm wrong (I hope I'm wrong)I can't believe that it's a bug to solve with additional lights (with only specular). Please help me Link to comment Share on other sites More sharing options...
abicalho Posted September 1, 2002 Share Posted September 1, 2002 This is really a tricky issue. Why? Well, let's think of how the renderer happens before you have Radiosity. You have a lot of specularity, because you have a very well defined light source. When you add Radiosity, what happens to the light? It bounces back and forth, and the light now will not come from a single light source, but instead it comes from "everywhere". This will make your specular highlight fade and in some cases almost disappear in the scene. The trick to solve it is to add "Specular-Only" light sources, so you can control specular highlights manually. Alexander | discreet Quality Engineer Link to comment Share on other sites More sharing options...
Guest penguin71 Posted September 1, 2002 Share Posted September 1, 2002 THank you abicalho for the reply Now I can be sure that I must add light with only specular on to solve the problem. Thank you very much I appreciate Can I ask you why in some cases the light come in to the room inside the corners? (the room s modeled with box primitive and inverse normal)If I put the meshing 0.20 (unit in meters)it gives the same problem .Must I reduce the meshing parameters to 0.05? Excuse me for the second question. But you are of the DISCREET GRoUP, who better than you can give me some suggests? THANK YOU Link to comment Share on other sites More sharing options...
plastic Posted September 2, 2002 Share Posted September 2, 2002 >>the room s modeled with box primitive and inverse normal don't do this. there are no 2-dimensional walls. model the room in a physically correct way. Link to comment Share on other sites More sharing options...
Mokiloke Posted September 16, 2002 Share Posted September 16, 2002 I can achieve specular highlights that are almost the same as when there is no GI by bumping specular up to 1000 and having really high gloss. Hmm, Strange! Link to comment Share on other sites More sharing options...
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