I want to create a separate glslProgram, which contains vertex shader, fragment shader, etc., it draws its own vertex set, and finally superimposes with the effect of osgearth. I execute it in a separate opengl environment, which can realize the superposition of multiple glsl programs, However in osgearth, I found that the rendering of the glslprogram I created has no effect. Will osgearth clear the results of other glsl programs? Is there something I am missing?
Thanks for advance! Any kind of advise is appreciated.