Hi all!
I have to perform a double pass convolution on a texture that is actually the color attachment of another render target, and store it in the color attachment of ANOTHER render target. This must be done multiple time, but using the same texture as starting point

What I do now is (a bit abstracted, but what I have abstract is guaranteed to work singularly)

	renderOnRT(firstTarget); // This is working. 

	for each other RT currRT{
		glBindFramebuffer(GL_FRAMEBUFFER, currRT.frameBufferID);	
		programX.use();
		glActiveTexture(GL_TEXTURE0);
		glBindTexture(GL_TEXTURE_2D, firstTarget.colorAttachmentID);
		programX.setUniform1i("colourTexture",0);
		glActiveTexture(GL_TEXTURE1);
		glBindTexture(GL_TEXTURE_2D, firstTarget.depthAttachmentID);
		programX.setUniform1i("depthTexture",1);
		glBindBuffer(GL_ARRAY_BUFFER, quadBuffID); // quadBuffID is a VBO for a screen aligned quad. It is fine.
		programX.vertexAttribPointer(POSITION_ATTRIBUTE, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
		glDrawArrays(GL_QUADS,0,4);

		programY.use();
		glActiveTexture(GL_TEXTURE0);
		glBindTexture(GL_TEXTURE_2D, currRT.colorAttachmentID); // The second pass is done on the previous pass
		programY.setUniform1i("colourTexture",0);
		glActiveTexture(GL_TEXTURE1);
		glBindTexture(GL_TEXTURE_2D, currRT.depthAttachmentID);
		programY.setUniform1i("depthTexture",1);
		glBindBuffer(GL_ARRAY_BUFFER, quadBuffID);
		programY.vertexAttribPointer(POSITION_ATTRIBUTE, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
		glDrawArrays(GL_QUADS, 0, 4);
    }

The problem is that I end up with black textures and not the wanted result. If I render them on screen with a simple passthrough with a screen-aligned quad the result is all but black.

The GLSL programs program(X,Y) works fine, already tested on single targets.

Is there something stupid I am missing? I'm bashing my head on this code since yesterday morning with no luck...

Any hint is much appreciated Thank you!