mark Posted June 21, 2005 Share Posted June 21, 2005 i have setup a basic scene so that i can render occlusion and colour passes. the scene consists of: 2 objects 2 shaders, each has: - occlusion parameter for export - lighting model (i.e. diff, spec) parameter for export 1 (non-GI) light 1 mantra ROP, with 4 deep rasters setup to correspond with the 4 parameters from the shaders. everything works perfectly when i substitute 2 spheres for my geometry, however when using my geometry (a curve -> revolve -> fuse; your basic revolved glass) the occlusion pass on that object does not render (or more accurately, it renders 100% black). ive narrowed the problem down to the geometry since it works with the 2 spheres. ive exported the geometry as a .bgeo and imported again with a file sop. ive tried fusing and not fusing the points, checked for intersecting geometry -- everything i can think of. im not saying this is the case but it is almost as though my geometry is bugged. it works as intended if i use an irradiance VOP in the shader which further annoys me, since i want occlusion! if i put a GI light in the scene and render everything in 1 pass - it all works. i will post the scene tonight, as i know this probably isnt making much sense, but in case anyone knows WTF is going on here i thought id ask first? is there anything that would prevent a revolved curve from rendering the occlusion pass? Quote Link to comment Share on other sites More sharing options...
edward Posted June 21, 2005 Share Posted June 21, 2005 On a long shot, could it be NURBs and/or no uv's? Quote Link to comment Share on other sites More sharing options...
mark Posted June 21, 2005 Author Share Posted June 21, 2005 hi edward thanks for the ultra fast reply long shots are fine i think thats what it will take! pretty sure its not nurbs (i had tried adding a convert SOP (to polygon) and it didnt help). no UV's ? interesting.. i did have UVproject SOPs on objects at one stage but had disabled them to help narrow the problem down.. i will definitely try this again. cheers Quote Link to comment Share on other sites More sharing options...
mark Posted June 21, 2005 Author Share Posted June 21, 2005 well its poly and there are UV's it seems the problem only affects geometry made with a revolved curve! the attached file is simplified.. should just need to render the only ROP and then look in COPS for the results. really strange problem! occlusionProblem.hipnc.zip Quote Link to comment Share on other sites More sharing options...
mark Posted June 21, 2005 Author Share Posted June 21, 2005 i posted at sesi as well Quote Link to comment Share on other sites More sharing options...
mark Posted June 21, 2005 Author Share Posted June 21, 2005 embarassingly simple answer thanks Wolfwood - normals Quote Link to comment Share on other sites More sharing options...
Marc Posted June 21, 2005 Share Posted June 21, 2005 man, I was gonna say normals! Beaten again Quote Link to comment Share on other sites More sharing options...
mark Posted June 21, 2005 Author Share Posted June 21, 2005 lol well you know what is worse, i thought normals .. but a reverse sop was one of the 50 things i didnt try oh well i learnt a valuable lesson the hard way Quote Link to comment Share on other sites More sharing options...
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