Would it be possible to have OpenGL or any other Realtime PREVIEW?

SEE THAT I REFERING ONLY TO THE PREVIEW AND NOT THE FINAL RENDERING

I know that in FF 3.0 there has been a great and very good advance in the speed preview with the new optional 4 passes way that is very useful.

But would be good to have it even faster to be able to customize the settings and try different presets more faster.

I know already the possible answer to this that knowing how works Filter Forge it will be a great NO.

But anyway I want to ask it.

I have seen that some 3D software and some other 2D graphic software are using some kind of software or hardware acceleration, either with OpenGL, OpenCL, CUDA, or any other possible way that could be programmed so they can show a PREVIEW of what you are doing in realtime or nearly realtime.

AND then after the final result render it takes more time and IS NOT done with this acceleration and it takes more time.

So they only thing that is made faster is the Preview and not the final result.

BUT thinking that as far as I know ALL is made with the same render engine of FF and the preview AND the final result are made in the same way, so I think it would NOT be possible to make a faster PREVIEW without making also a faster render engine and final result, and it has been told from FF Inc. that there will be no speed upgrade for the final result.

They've already explained that GPU acceleration isn't in the current plans. Don't see how this would be any different...