Posted by r.jaoui on Jun 28, 2021; 11:44am
URL: https://forum.jogamp.org/Multisampled-renderbuffer-and-dark-edges-tp4041171p4041175.html

Update : I found the solution, I needed to enable framebuffer sRGB mode by calling :

gl.glEnable(GL2.GL_FRAMEBUFFER_SRGB);

This way, no color mapping in the native linear color space is performed, and the multisampling resolve is performes with linear gamma operations.