The Persistence of Vision Raytracer (POV-Ray).
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Attached to Project: POV-Ray
Opened by Mike H - 2010-06-06
Last edited by Thorsten Fröhlich - 2010-06-20
Opened by Mike H - 2010-06-06
Last edited by Thorsten Fröhlich - 2010-06-20
FS#121 - Option to render pixels randomly, or in Nth pixel
Assuming there are no performance issues, it would be nice to tell Povray to select the pixels to render randomly, so that the image gets filled in gradually instead of from top to bottom and from left to right.
Also, maybe an option to tell it to render every Nth pixel.
Closed by Thorsten Fröhlich
Sunday, 20 June 2010, 07:12 GMT
Reason for closing: Not a bug
Additional comments about closing:
Sunday, 20 June 2010, 07:12 GMT
Reason for closing: Not a bug
Additional comments about closing:
It is already possible to tell POV-Ray to only render a partial image, see <http://www.povray.or g/documentation/view/3.6.1/217/>< br />
My current understanding is that Anti-Aliasing uses the pixels beside it to work on. Working from top/bottom and left/right, gives a speed boast of already knowing most of the top and right pixels for any pixel being worked on. I use Anti-Aliasing on most scenes.
Stephen S
Given the new distribution per block to rendering threads (in 3.7), an option could be (optionally) use a different computation method for the next block to render.
It won't avoid the appearance of blocks, but might provide more details about the center of the image first.
From my old memory, low cost algorithms to get a pseudo-random traversal of a 2D array do exists (at least with a scrambled 2D array of 2D coordinates).
To render every Nth pixel... there is the preview mosaic options (are they working in 3.7 yet ?), at least it covers the power of 2 for N.
Yeah, I guess my suggestion doesn't really make sense. We already have a lot of options with the mosaic preview and render-by-mouse-selection capabilities.