krautsourced Posted March 5, 2012 Share Posted March 5, 2012 I've been playing with the new cloth solver in H12 and while the simulation runs perfectly fine (and a lot faster than before ), I have a tiny problem while rendering the result. As you can see in the attached image, the cloth grid has a sort of faceted look, especially noticeable in the reflections (but even if I turn reflections off entirely, you can still see them). I assume it has something to do with normals? I've found another thread here in the forum where it was suggested to add UVs to the object, but that made no difference at all. I'm sure it's something trivial, but... no idea. The grid is 100x100, btw. Cheers Quote Link to comment Share on other sites More sharing options...
hopbin9 Posted March 5, 2012 Share Posted March 5, 2012 Did you try adding a Facet SOP and turn on Post Computer Normals? Quote Link to comment Share on other sites More sharing options...
krautsourced Posted March 5, 2012 Author Share Posted March 5, 2012 Did you try adding a Facet SOP and turn on Post Computer Normals? I tried that, to no avail. Seems like it's not the normals then. Quote Link to comment Share on other sites More sharing options...
hopbin9 Posted March 5, 2012 Share Posted March 5, 2012 Could you post a bgeo file of a single frame. I'd like to take a closer look. I know I had this problem once, but forget how I fixed it. I think it was a simple thing. Quote Link to comment Share on other sites More sharing options...
AdamJ Posted March 5, 2012 Share Posted March 5, 2012 If you're using micropolygon engine try increasing your shading rate see if it help? Another thing would be to try rendering with raytrace engine and see if appears correct. Quote Link to comment Share on other sites More sharing options...
krautsourced Posted March 5, 2012 Author Share Posted March 5, 2012 If you're using micropolygon engine try increasing your shading rate see if it help? Another thing would be to try rendering with raytrace engine and see if appears correct. Here's a bgeo frame. I've been trying with both the micropoly and raytracing renderer, no difference. I notice the same effect if I open the sample project that comes with H12 "BlanketBall". If you increase that grid's resolution to a similar 100x100 size and zoom in a bit into a deformed part of the cloth, you'll notice the grid-like structure in the rendered image. 32bgeo.zip Quote Link to comment Share on other sites More sharing options...
nord3d Posted March 5, 2012 Share Posted March 5, 2012 As I think, It's because the ratio of the folds width too close to spacing of the grid. Try to add subdivide sop or use Polygon as Subdivision. Quote Link to comment Share on other sites More sharing options...
Fabiano Berlim Posted March 5, 2012 Share Posted March 5, 2012 Your polygons are very twisted. Turn "subdivision surfaces" on and set "dicing flatness" to zero. That will solve most of the problems. Quote Link to comment Share on other sites More sharing options...
nord3d Posted March 5, 2012 Share Posted March 5, 2012 (edited) untitled+.hipnc.zip Edit: For best result, as Fabiano wrote, decrease Dicing Flatness and, may be, increase Shading Quality. untitled+++.hipnc.zip Edited March 5, 2012 by nord3d Quote Link to comment Share on other sites More sharing options...
krautsourced Posted March 5, 2012 Author Share Posted March 5, 2012 Your polygons are very twisted. Turn "subdivision surfaces" on and set "dicing flatness" to zero. That will solve most of the problems. Cheers guys! Those two parameters did the trick! Quote Link to comment Share on other sites More sharing options...
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