Is it possible to change the output, for example with a filter, or make the color gray?
And if, how?
Can I show two screen outputs on each other and shake it?
i don't really get what you want, if you could give a example of what you want… and theoretically everything is possible in programing ;D
Well, the real hurdle is getting the info back out of the V-card I believe…
(currently, jME doesn't support post-processing of any kind)
Of course jME supports post-processing… The bloom render pass for example, is a post-processing filter. If you want render the screen as grayscale, render the scene into a TextureRenderer, then render a full-screen quad with a shader that converts RGB into grayscale. There's a pass package in jME you might want to check out.
Well, the real hurdle is getting the info back out of the V-card I believe....
You do not need to get the framebuffer into the CPU in order to post-process it.
I got an idea
I stand corrected