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Showing results for tags 'rat'.
Found 3 results
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Hi everyone, I am trying to convert a displacement map from tif to rat with iconvert. I am getting some weird results and I am hoping anyone here might be able to tell me what the actual problem is. In the image you can see the different results I am getting. Only the original tif gives me the results I want. 8 bit is wrong of course but I thought I'd still include it. I am using the classic shader in Houdini 16. Thanks in advance
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Hello, Mantra during rendering is always converting all non-rat textures into rat and then discarding them after the render is finished. So I am considering batch-converting all of them to rat using the iconvert tool while keeping their original name and replacing only file extension. Batch conversion of textures is not a problem, but I am curious about re-linking them in shader networks. Arnold has an elegant solution for that - it checks if there is a .tx version of a texture and if so, it will use it and save some time. It also allows to do one-time conversion during the first use of a texture and then it will keep .tx version around inside the texture folder. So I am humbly hoping that there is somewhere hidden feature for this behavior also in Mantra. Any experience with that? Otherwise I can just scan all shading nodes in Houdini with python and replace texture file extensions for rat. Thanks, Juraj -
From a few simple tests, just having Mantra render a large # of high res EXRs takes forever and uses a lot more RAM than having pre-converted the textures to rat files (EXRs - ZIP, Multi-scanline blocks). So that makes me want to pre-convert all our textures to rat files automatically. I'm interested in how other places handle texutres in their Houdini pipelines. Is there better ways to export out Do you normally convert them to rat files and then render them? How do you keep the rat and exr in sync? Or do you let Mantra always do that for you?
