i am thninking about one optimization to mi render that they have two passes, but the rendering works how to if only have one pass.
its in first step when i compute all scene, i dont try making deferred shading. The case is that i can get optimize me render using an second step only for compute specific layer that i extract from first pass with MTR.
(yes, to like blur shadows noise)
but actually i need attach the second layer that is all FragColor from first step, and how i dont using deferred shading it makes little sense using one FBO color texture for this, (the specifict layer that i have interest of compute in Quad is a 8bits GLRED)
i asking me if its possible use the first layer directly in topFBO screen and the second in my MRT tarjet to compute in second pass.