Posted by philjord on Jun 18, 2018; 9:26pm URL: https://forum.jogamp.org/sRGB-and-gamma-correction-in-Java3d-tp4038946p4038950.html
Jim,
This is a great question and I'm fairly embarrassed to say I had no real idea how sRGB was handled until you asked this question.
The reason for that (I've discovered) is that S3TC compressed images don't separately express that they are sRGB and these are the images I've worked with mainly (through an extension to Java3D that's available in Java3D 1.7).
See issue 9 here:
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_sRGB.txt
The open GL definition for Images states they are linear unless the GL_EXT_texture_sRGB is available
https://www.khronos.org/opengl/wiki/Image_Format The JoglPipeline in Java3D does not query for nor use that extension.
So loading and blending entirely in linear space is appropriate.