Advanced Member bobzilla Posted December 26, 2010 Advanced Member Report Share Posted December 26, 2010 I've exported an OBJ from Cinema 4D. Brought it into 3DCoat for Per Pixel Painting. Upped the subdivisions a little and made the textures 4096. When I paint on the model, the brush creates artifacts. When I repeat the process with Microvertex Painting it looks even worse the strokes are all fuzzy. What would cause this? I've done the UV in BodyPaint and it looks fine there. I'm on an 2 GHz Intel Core Duo iMac with 2 GB of RAM with a Radeon X1600 graphics card running on 10.5.8. Thanks. Bob (see attached) Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted December 27, 2010 Author Advanced Member Report Share Posted December 27, 2010 Nothing, huh? Well, if there's any other information that might help solve the problem, just ask. Right now, I can't use this model in the program for some unknown reason. Quote Link to comment Share on other sites More sharing options...
Psmith Posted December 27, 2010 Report Share Posted December 27, 2010 Bobzilla: I've seen this before and am pretty sure it has been reported as a bug. Not sure what causes it or how to work around it. I'll report it to Andrew, again. Greg Smith Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted December 28, 2010 Author Advanced Member Report Share Posted December 28, 2010 Thanks, Greg. I tried all sorts of things to get it to work, but it always looks the same. Hopefully it will get fixed. I guess I'm the only one on here NOT in the Voxel room! Bob Quote Link to comment Share on other sites More sharing options...
Taros Posted December 28, 2010 Report Share Posted December 28, 2010 It looks like the uv seams are at the place where the problems appear, right? Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted December 28, 2010 Author Advanced Member Report Share Posted December 28, 2010 Nope. No seams there. Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted December 30, 2010 Author Advanced Member Report Share Posted December 30, 2010 I downloaded the latest version hoping it would fix the brush problem, but it didn't. I loaded up the creature model that comes with the program and have the same problem, so it's not my model. Is anyone else having this problem? Bob Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted January 4, 2011 Author Advanced Member Report Share Posted January 4, 2011 I'd like to know if anyone else is having this problem. I can't really use the program for what I need as I can't seem to paint depth in the Paint Room. I get the same result on objs that come with the program, so it's not my imported model. Thanks. Bob Quote Link to comment Share on other sites More sharing options...
Reputable Contributor digman Posted January 5, 2011 Reputable Contributor Report Share Posted January 5, 2011 I'm testing this now, if you do not mind could you share your obj file. Yes, there are problems with some meshes you are not the only one. Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted January 5, 2011 Author Advanced Member Report Share Posted January 5, 2011 Well, I'd rather not share the mesh, but it happens on objs that come with 3DCoat. The dino, just brush along the lower jaw or go across the arm and leg where they meet the body. It's really bad where the mesh curves in as in where limbs meet the body. The creature, too. Bob Quote Link to comment Share on other sites More sharing options...
Reputable Contributor digman Posted January 5, 2011 Reputable Contributor Report Share Posted January 5, 2011 Well, I'd rather not share the mesh, but it happens on objs that come with 3DCoat. The dino, just brush along the lower jaw or go across the arm and leg where they meet the body. It's really bad where the mesh curves in as in where limbs meet the body. The creature, too. Bob The default creature is not a very good edge flow model. There are lots of problems with that one. There is alot of overly elongated polygons and polygons that are co-planer. The dino has some of the same problems, poles being around where the leg and thigh join plus extreme elongated polygon faces. That would be very bad for animating too. Some of those old models really should not be included in the samples folder. The problems you see in those two meshes are directly related to the above facts. Here is a tip just if you do not know... 3DCoat does not handle overly elongated polygons very well. Causes lots of problems. Extreme Co-planer polygon faces the same. Poles can cause problems especially if they are along a seam line. Now, I not saying your model has bad edge flow but the above is just information for you... Quote Link to comment Share on other sites More sharing options...
Reputable Contributor digman Posted January 5, 2011 Reputable Contributor Report Share Posted January 5, 2011 Here is a picture of of the dino problem area with the pole and extreme enlongated polygons. Low polygon view. Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted January 5, 2011 Author Advanced Member Report Share Posted January 5, 2011 In the beginning of this thread you can see the model and wireframe: http://www.3d-coat.com/forum/index.php?showtopic=2108&view=&hl=bobzilla&fromsearch=1 Quote Link to comment Share on other sites More sharing options...
Taros Posted January 5, 2011 Report Share Posted January 5, 2011 Well, I'd rather not share the mesh, but it happens on objs that come with 3DCoat. The dino, just brush along the lower jaw or go across the arm and leg where they meet the body. It's really bad where the mesh curves in as in where limbs meet the body. The creature, too. Bob I am not shure, which dino you mean, but normalmap problems appears always, when uv seams are not set well. EDIT: I found the sample dino. Yes, problems at seams and the texel size is not the same in all uv islands, should be equalized. The it could be tangent related problem, too. They appear in all apps. But there are some solutions to avoid them. But mainly it is a seam problem in the dino model. Should be set better. Quote Link to comment Share on other sites More sharing options...
Advanced Member bobzilla Posted January 18, 2011 Author Advanced Member Report Share Posted January 18, 2011 I've posted this over in the Painting Bugs forum, but it looks pretty dead over there. Here are some screen shots with the low poly mesh turned on in the spots that are not working. There are no seams in either area. I hope this can be fixed as I can't really use it like this. Bob Quote Link to comment Share on other sites More sharing options...
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