The Persistence of Vision Raytracer (POV-Ray).

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Attached to Project: POV-Ray
Opened by Christoph Lipka - 2013-02-01
Last edited by William F Pokorny - 2016-10-28

FS#270 - render abort-continue (+C) sometimes skips blocks

When aborting a render when there are unfinished blocks among finished ones, under certain conditions some of those blocks are skipped when continuing the render later.

Closed by  William F Pokorny
Friday, 28 October 2016, 14:39 GMT
Reason for closing:  Fixed
Additional comments about closing:  

Related discussion from Feb 2016:
http://news.povray.org/povray.bu greports/thread/%3C56b181dc@news.povray. org%3E/

Potentially still a problem with 3.7.0 per Christoph comments, but fixed in 3.7.1 in that final output image file is OK. Mike Horvath was running 3.7.0.

Christoph Lipka commented on Friday, 01 February 2013, 12:46 GMT

fixed with change #5771

Christoph Lipka commented on Sunday, 10 November 2013, 13:48 GMT

According to recent discussions on news://news.povray.org/povray.beta-test, the problem still persists in some situations.

Christoph Lipka commented on Sunday, 10 November 2013, 15:37 GMT

The remaining issues turned out to be entirely unrelated to the root cause eliminated with #5771.

What happens is that when a radiosity render is restarted, the pretrace for the missing blocks is done again; during the early stages of this pretrace, the "pixels" may be far larger than the render blocks, and may overpaint some already rendered blocks.

Change #6086 provides a hotfix that limits the problem to the render preview. The generated image files will be fine.


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