[Bf-committers] Update random seed between sub-frames (old subject:QMC sampling)
lofgrenmeister at gmail.com
Mon Jun 14 17:01:10 CEST 2010
Quick follow-up on this subject:
Is it possible to update the random seed on QMC adaptive or QMC constant
between each motion sample in Full Scene Motion Blur?
For Shadows, Reflections and AO.
This could possibly decrease rendertimes by an order of magnitude for a
raytrace heavy scene.
Short example if you render the scene with a minimum amount of shadow,
reflection and AO samples:
Render first sub-frame, render second sub-frame, render third subframe.
Noise pattern identical between subframes and result shows heavy noise.
Render first sub-frame, update random seed, render second sub-frame, update
random seed, render third subframe. Noise patterns get's accumulated, end
result identical to using 3 more shadow/reflection/AO samples.
I've been trying to make sense of the source code and try to change this
myself but my brain just isn't wired that way, it's all hieroglyphs to me :)
More information about the Bf-committers