Posted by rndmbt on Nov 25, 2023; 11:30am
URL: https://forum.jogamp.org/Shader-Uniform-Sampler2D-Update-in-TextureUnitState-not-applied-tp4043151p4043162.html

Hey basti, I will definitely keep your approach in mind because it makes the last n rendered textures available, so I could lookup what has happened there if needed. Though the essential problem was that if an image was already existing in a Texture Object, it was not reloaded in the TextureRetained Object (as far as I understood). Maybe a sphere with object space normals rotating around the y axis is not the best example here because it is in fact repeatable. But imagine a moving camera, controlled by the user, you don't know the position and distance etc. previously. If you set the pool size to 50, then frame 51 would not reload the new image into the texture at index 0 but show the old image of the texture at index 0, as the setting of the image does not work in this immediate mode rendering case.