kirk23 Posted November 14, 2021 Posted November 14, 2021 I have just figured out that by recording a switch to 32 bit mode and back in a macro we could get many filters working in a new perfect manner. So I am trying an ancient trick with producing normal map RG (xy) channels by embos filter and B (z) channel by edge detect filter inverted. It all works just fine except gamma . Switching back to 16 or 8 bit makes a gamma shift and I am struggling to figure out the right values. Can't get a perfect 128 (0,5) value for front looking pixels in RG channels. Any suggestions? Quote
NotMyFault Posted November 14, 2021 Posted November 14, 2021 (edited) Gamma is simple c^2.2 or c^(1/2.2) depending on direction. c for every color channel. Alpha channel might be excepted (test it with A=0.5 if it stays 0.5 or becomes 0.2 something) PS if gamma is in your way while in RGB/8, just set it from 2.2 to 1, maybe set it to 1.0 as default in preferences. Edited November 14, 2021 by NotMyFault Quote Mac mini M1 A2348 | MBP M3 Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.
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