[vtkusers] SLI useless?

[Michael Knopke]

I tried SLI once (2 x G6800), to gain better performance with vtkVolumeTextureMapper3D. Using AFR didn't work at all (single GPU) but SFR seemed to work, although the texture mapper is very limited to video-memory speed, so there was no gain and workload dropped to one GPU only. But when forcing to extreme antialiasing I could clearly see that SFR is working (via build in workload indicator). Also I have multiple OpenGL-Windows in my app. (so this limitation in the pdf refers to AFR I guess)
Hope that helps.

Michael
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