shawnhansen Posted April 22, 2013 Share Posted April 22, 2013 Hi everyone. I am having a major problem with mapping seams when mapping in V-Ray. I have attached two images to illustrate my problem. One of the renderings are done with Rhino´s own render engine, the other is done with V-Ray´s engine. The mapping and everything is the same on both pictures, but for some reason V-Ray creates these very apparent mapping seams. I have tried everything i can think of to fix this, but nothing have worked. I really hope that there are someone in here who can help me out. I am using Rhino 4.0 SR9, V-Ray 01,05,29 Thanks! Link to comment Share on other sites More sharing options...
Krisztian Gulyas Posted April 22, 2013 Share Posted April 22, 2013 Have you tried lowering the reflection map value in the material editor (from 100 to 25 for example)? Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 Hey Krisztian, thanks for the reply. The material actually doesent have a reflection layer. It only has a diffuse layer with the bitmap texture. Link to comment Share on other sites More sharing options...
Krisztian Gulyas Posted April 22, 2013 Share Posted April 22, 2013 (edited) Then make it less reflective with the black-white scale (make it black if it's not). Probably that's not the problem, but worth checking it. Try tweaking the diffuse map in Photoshop (just make the bright areas darker). Save the photoshop file and put that in the diffuse slot. You can leave PS open and if you need to change something, you just do it, save it, and changes will take effect in Max. Sorry if these are really basic things, but I don't know anything about your skills. Edited April 22, 2013 by krisztiangulyas Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 Maybe i should mention that the mapping projection here is "Box". If i simply use a "surface" projection the result is even worse, see attachment. It seams like v-ray cant apprehend the edges :-/ Link to comment Share on other sites More sharing options...
beestee Posted April 22, 2013 Share Posted April 22, 2013 (edited) I don't know much about Rhino, but found this: http://www.rhinojungle.com/group/vray/forum/topics/solution-for-mapping-textures Edit: nevermind You should probably send this behavior on to chaosgroup as a bug so that they can look into it. Looks like the vray material is misinterpreting the mapping coordinates. Edited April 22, 2013 by beestee Link to comment Share on other sites More sharing options...
Krisztian Gulyas Posted April 22, 2013 Share Posted April 22, 2013 You need to unwrap it, then it will look good but it doesn't affect the image itself. I mean it won't create self-illuminated-like edges. Can you send me the lighting settings? Are you using VRay lights? Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 What do you mean with "unwraping" ? I dont have any lights in the sceen except from the GI skylight. I have tried to minimize things in the sceen to help troubleshoot this. Link to comment Share on other sites More sharing options...
Krisztian Gulyas Posted April 22, 2013 Share Posted April 22, 2013 Oh, sorry, I forgot that we are talking about Rhino... "unwrap UVW" is a modifier in Max. Try turning that off and using a vray light (a plane or sphere light) and a vray camera. Link to comment Share on other sites More sharing options...
beestee Posted April 22, 2013 Share Posted April 22, 2013 Krisztian, it seems like you need to have a closer look at the original issue again. This problem is not related to reflections or lighting. Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 So.. I tried it and it didn´t fix the problem. BUT in the process i made the projection mapping bit bigger, and for some strange reason it fixet the smaller texture seam in the middle part of the seat. I messed around with it to see if i could fix the seams on the sides using this method, but it didn´t do anything. Link to comment Share on other sites More sharing options...
Krisztian Gulyas Posted April 22, 2013 Share Posted April 22, 2013 Oh, now I get it. I thought bright edges are the problem. Sorry. I have never used Rhino, but in Max you can set the projection mapping to box, sphere etc. and you can unwrap it and create a flat surface and project on that. It's like unfolding a box to six squares. Can you do it in Rhino? Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 Benjamin, exactly. Also, if you take a really close look at the "seams" it would appear as if the actual "seam" itself consists of the texture, but repeated many many times. I really appreciate all your replies. Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 The projection mapping is set to box. That is apparently why these strange seams occur arround the edges. I know what you mean, but i dont think that is a possibility in rhino without some sort of plugin. Link to comment Share on other sites More sharing options...
beestee Posted April 22, 2013 Share Posted April 22, 2013 Looking at this help file, it appears that there are two different types of box mapping in rhino, single and divided. I could see the issue above being a problem with using the divided method since the texture is being scaled differently at the box edges. Try the single method if you have not already. Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 No, this is actually the single method i am using. If i try using the devided method it looks even worse. But that is exactly what makes this problem so strange. Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 It seams i have solved the problem! I messed around with mapping and noticed a projection called "Spherical". After a lot of adjusting its a much better fit than planer and box projection. Judge for yourself. Now there is only kind of a seam from the midle of the seat and out, but its ok for now. THANKS FOR YOUR FEEDBACK! :-) Link to comment Share on other sites More sharing options...
beestee Posted April 22, 2013 Share Posted April 22, 2013 (edited) Can you post the mapping properties and mapping widget for the object in question? Just curious to see how Rhino handles texture mapping. Found a tutorial that covers it some. http://vray.com/vray_for_rhino/manual/texture_mapping.shtml Edited April 22, 2013 by beestee Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 Sure. I hope this will do. Link to comment Share on other sites More sharing options...
shawnhansen Posted April 22, 2013 Author Share Posted April 22, 2013 BTW, thanks for the link but i have looked i through about 10 times Link to comment Share on other sites More sharing options...
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