Am 08.11.2010 18:26, schrieb stevenvh:

> Yes, it also happens with beta 39. Odd thing: the first iteration is very slow
> as expected (we're talking about radiosity on a large number of objects), but
> when the messages start to pop up, the following iterations are passing very
> quickly, until the rendering stops with the "render failed" message while it's
> rendering at pixel level. My hunch is that radiosity is ignored; successive
> pixels are just generated too quickly.

That may also be simply due to a low per-pixel radiosity sample density, 
i.e. POV-Ray needs to compute less radiosity samples per pixel. (When 
you increase the resolution of an image, POV-Ray does not automatically 
increase the number of radiosity samples.)

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