aboubakrvfx Posted December 2, 2016 Share Posted December 2, 2016 hi every one, whenever i pick a color from the final render i got this weird result , some times it's slightly bigger and other it's lower , i'm using default value in houdini didn't change any things in render or linear workflow any idea ? Quote Link to comment Share on other sites More sharing options...
davpe Posted December 3, 2016 Share Posted December 3, 2016 just guessing, but with such a small deviation like this (~0.0001) i would blame a sampling noise Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 9 hours ago, davpe said: just guessing, but with such a small deviation like this (~0.0001) i would blame a sampling noise thanks for your reply i tried to fix it by reduce the noise in mantra rop but no successes, i just tested it in comp and i get the same result, is it a bug ?do you know any other tools than can pick a color from an image for houdini ? Quote Link to comment Share on other sites More sharing options...
davpe Posted December 3, 2016 Share Posted December 3, 2016 (edited) what are you trying to do actually? is it causing you any problem or are you just curious? Edited December 3, 2016 by davpe Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 i'm trying to mimic the color id in quixel ddo , instead of creating for each part of your object a group and assign a material to it i want just to pick the color id from the render pass then it switch to it automatically here my example Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 the only problem is this random small value that change when i pick the color from my render pas , it ruin every things Quote Link to comment Share on other sites More sharing options...
davpe Posted December 3, 2016 Share Posted December 3, 2016 hmm, I see. the workflow is interesting. i just tried this and found out color picker only has 8-bit color resolution so this may be it. colors in render are fine (color inspector show correct numbers) but picker seems to do a poor job. shame. Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 maybe there is something we can change via env or python ? Quote Link to comment Share on other sites More sharing options...
davpe Posted December 3, 2016 Share Posted December 3, 2016 it is great though how much freedom houdini offers you to design your own workflows - theoretically in this case Quote Link to comment Share on other sites More sharing options...
davpe Posted December 3, 2016 Share Posted December 3, 2016 Just now, aboubakrvfx said: maybe there is something we can change via env or python ? maybe, but this is something I wouldn't know how to approach. you need someone smarter to help Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 5 minutes ago, davpe said: maybe, but this is something I wouldn't know how to approach. you need someone smarter to help no problem dude you are smarter then me XD . another thing when i change my render pass to 8bit integer this little value pop up in the inspector if i can find a way to pick it it will solve my problem Quote Link to comment Share on other sites More sharing options...
galagast Posted December 3, 2016 Share Posted December 3, 2016 (edited) I believe the value is 0.2627 * 255 = 66.9885 (or as an integer 67). I also played around the settings a bit, and here are the things that I changed in order to get the same values from the Inspector and the Picker. Edited December 3, 2016 by galagast Quote Link to comment Share on other sites More sharing options...
aboubakrvfx Posted December 3, 2016 Author Share Posted December 3, 2016 46 minutes ago, galagast said: I believe the value is 0.2627 * 255 = 66.9885 (or as an integer 67). I also played around the settings a bit, and here are the things that I changed in order to get the same values from the Inspector and the Picker. thanks a lots for this information i tried your method but it's still not working with some area , i'm trying to tweak it and i'll post the result , thanks again Quote Link to comment Share on other sites More sharing options...
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