nocommprendo Posted June 14, 2012 Share Posted June 14, 2012 Hi, I'm having a serious problem with severe stair stepping in an image from 3ds MAX and VRay 1.5. Please the image attached. Anyone knows any solutions for the problem? Maybe a parameter? Anti-aliasing? Link to comment Share on other sites More sharing options...
Zdravko Barisic Posted June 14, 2012 Share Posted June 14, 2012 please mark with red what is your problem? try with AA - 2/10, that would be a hard sharp AA settings good luck!!! Link to comment Share on other sites More sharing options...
Eric Posted June 14, 2012 Share Posted June 14, 2012 Under "Color Mapping" in the V-Ray render setup tab, enable "Clamp output", and put the "Clamp level:" to ".97". That should fix the problem. The "stair stepping" aka jaggy lines has to do with Max's inability to smoothly transition from the brighter than white specular hi-lite to the adjoining colors. By clamping the output, you're forcing the colors to clamp to the visible range of colors, or "pure white" to "pure black", and not beyond those two colors. Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted June 14, 2012 Share Posted June 14, 2012 I don't know the answer but Eric's logic does seem correct. Though why 0.97? 1.0 would be just as good. I would add to this that your edges themselves are far too sharp for such a close up shot. Detailed models make for detailed shots. Chamfer some edges, even if the amount is barely visible. Link to comment Share on other sites More sharing options...
Eric Posted June 14, 2012 Share Posted June 14, 2012 .97 vs 1.0 - good question, and one I don't know the answer to. I came across it in a tutorial, and started using .97 and it fixed my problem so I updated my presets with it and never looked back. For the chamfered edges - I like using the VRayEdgesTex map in the bump slot. However, I can't find it right now since I just updated to the new version of VRay - it's still supported, but I don't know how to load it for new materials. Link to comment Share on other sites More sharing options...
Dave Buckley Posted June 14, 2012 Share Posted June 14, 2012 what is that screenshot from? frame buffer or photoshop. is it a 100% crop? it just looks to me like a computer display issue and not displaying the full pixel. Link to comment Share on other sites More sharing options...
Nic H Posted June 15, 2012 Share Posted June 15, 2012 its not a clamp issue its shitty AA - you can see it on the timber edge above as well. Link to comment Share on other sites More sharing options...
nocommprendo Posted June 15, 2012 Author Share Posted June 15, 2012 (edited) Thanks you all for your replies. I didn't mark any specific area of the image, because I see this problem all over. I'm going to test the same image by modifying clamp and AA. Let's see which one has the most influence concerning this specific jaggy lines issue. I'll come back with the findings. Edited June 15, 2012 by nocommprendo Link to comment Share on other sites More sharing options...
nocommprendo Posted June 15, 2012 Author Share Posted June 15, 2012 please mark with red what is your problem? try with AA - 2/10, that would be a hard sharp AA settings good luck!!! You propose 2/10 setting. But which filter should I use? There area several options... Link to comment Share on other sites More sharing options...
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