You should be able to set the background color (glClearColor).
Note that using a non-black background color could effect the results of the blending used in both renderers. If this is the case, the first pass of these renderers should do no blending.
You should be able to set the background color (glClearColor).
Note that using a non-black background color could effect the results of the blending used in both renderers. If this is the case, the first pass of these renderers should do no blending.