a well supported feature for glDrawPixels(), especially on ATIs crashes
happen with it irregularly. (note; drawing float is a regular opengl 1.0
feature...).
Now all scanline/part updates in renderwindow is converted to 32 bits
before drawing, also the in the UV Image window only 32 bits RGBA is drawn.
What is still float: drawing the final image after render in renderwindow,
and drawing the Z or Alpha in renderwindow and UV image.
Of course we need to test this first. :) Will await reports...
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