DBaciu Posted November 9, 2011 Share Posted November 9, 2011 Hello guys. I am trying to do some test renders with fur. The problem is that when I try to render with micropolygon rendering engine, the render starts, it goes on for a while and then it stops without any reason, or at least without a reason that I can conceive. The Mantra node shows Command Exit Code: 11, or sometimes Command Exit Code: 7. I tried to render with PBR and this time the render completes. I really can't understand why the render stops when I use micropolygon rendering... Also, can you give me some general advice regarding rendering fur? Quote Link to comment Share on other sites More sharing options...
tmdag Posted November 9, 2011 Share Posted November 9, 2011 (edited) For fur, micropolygon is a good choice 1. download the latest build 2. Go to your mantra settings, turn on 'alfred style progress', set 'Verbose Level' to 4 and check out terminal / Console I'm not sure about exit code 11 or 7, it's not documented but here was one thread about exit no. 11: Edited November 9, 2011 by tmdag Quote Link to comment Share on other sites More sharing options...
loudsubs Posted November 10, 2011 Share Posted November 10, 2011 Looks like you could increase the render ratio in order to get more fur on the horse, and maybe make some of the really short hairs longer. In your light use depth map shadows (if you arent already), try turning up the shadow resolution to 1024x1024, and increase the shadow pixel samples. Quote Link to comment Share on other sites More sharing options...
DBaciu Posted November 10, 2011 Author Share Posted November 10, 2011 Thank you! I suspect it have something to do with the shader. I used Marschner Hair shader from the Exchange and it renders ok, without stops or anything. I will investigate further. Quote Link to comment Share on other sites More sharing options...
DBaciu Posted November 12, 2011 Author Share Posted November 12, 2011 Guys, I still have problems with fur rendering. Apparently if I try to use some texture to drive some fur attribute, the problem comes back again: the render stops randomly. Or at least this is what I think it's happening. I put a color map in the Marschner Hair shader that I use (successfully) and it start stopping again. I tried do do what tmdag suggested (set the verbose level to 4 etc) but I see no clue about any error whatsoever. Quote Link to comment Share on other sites More sharing options...
AdamJ Posted November 13, 2011 Share Posted November 13, 2011 If it stops every time and is reproducible, submit a bug report to Sesi (lock your nodes and include the hip file).. here http://www.sidefx.com/index.php?option=com_content&task=view&id=768&Itemid=239 Quote Link to comment Share on other sites More sharing options...
DBaciu Posted November 18, 2011 Author Share Posted November 18, 2011 Guys, the problem is more than serious. Have you tried to render fur with Houdini installed on Linux? It appears that this is the problem: Houdini on Linux. If you try to render fur with a texture driving some attribute of the material, (like color) the render stops randomly. So even the default shader (textured_hair) won't render, because is using the "leopardskin.rat" texture by default. If there are no textures used in the shader, it appears to be working. I tried this on an Ubuntu 10.04 installation, AND on a CentOS 6.0 installation. On Windows everything seems to be ok. This is really strange... Quote Link to comment Share on other sites More sharing options...
tmdag Posted November 18, 2011 Share Posted November 18, 2011 I was using houdini on linux only and never had such issues. I would sugges downloading latest build and writing sesi support Quote Link to comment Share on other sites More sharing options...
DBaciu Posted November 19, 2011 Author Share Posted November 19, 2011 Well, take this scene and try to render it. I tried all possible scenarios I could think of. Sometimes I thought I found what's causing it, (I tried many parameters, maps, paths, etc), but no. I didn't find the real couse for this random stops. Sometimes it renders till finish, sometimes it does not. I don't know what's causing this so I can't repeat it (this bug?) reliably. So please take this scene, render (on linux), see if it finishes render, change some parameters, (for example, maximum thickness), render again etc... 011_c_test.hip Quote Link to comment Share on other sites More sharing options...
priel Posted December 21, 2011 Share Posted December 21, 2011 Well, take this scene and try to render it. I tried all possible scenarios I could think of. Sometimes I thought I found what's causing it, (I tried many parameters, maps, paths, etc), but no. I didn't find the real couse for this random stops. Sometimes it renders till finish, sometimes it does not. I don't know what's causing this so I can't repeat it (this bug?) reliably. So please take this scene, render (on linux), see if it finishes render, change some parameters, (for example, maximum thickness), render again etc... hi , i have the same problem and i think alot of others would have encounter this problem too. What i did to solve it is to increase the hair length slightly and it will finish the render . Downloaded your scene file and i just increase the hair length from 6 to 6.1 and it solve the problem . Hope it help you , cheers Quote Link to comment Share on other sites More sharing options...
papicrunch Posted December 21, 2011 Share Posted December 21, 2011 render ok here houdini 11.1.118 and windows 64 Quote Link to comment Share on other sites More sharing options...
nord3d Posted December 25, 2011 Share Posted December 25, 2011 Tested your scene at Houdini 11.1.147 Linux x86_64 gcc4.4 (Ubuntu 10.10 64-bit). First, render stills repeatedly (about 10 times), all ok. Then, I made a simple turntable animation of 100 frames and render as sequence - no problem. It reminded me of another case where there was a similar problem: a scene was render normally under windows, but crashes under linux. I sent that scene to other persons for test on their computers, and they reply that they had no problems. So I decided that it was because of hardware. And after total upgrade the computer, that scene renders with no crashes. Why it was no problems on windows, but problem on linux, is still a mystery for me. But may be there was some analogy with your case... Quote Link to comment Share on other sites More sharing options...
DBaciu Posted January 7, 2012 Author Share Posted January 7, 2012 Thank you all. A mystery it is indeed. Quote Link to comment Share on other sites More sharing options...
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