Christian Froeschlin <chr### [at] chrfrde> wrote:
> ZaK wrote:
>

>
>
> this is difficult to compare based on your explanation, the scenes
> are setup very differently (why is the object enclosed in a opaque
> box in the second scene, where is disc?).

this is solely for visual purposes,also to eliminate the computation of the
outside of the reflector.

and i placed a flat box instead of the disc, to obeserve sun rays hitting nearby
the reflector, but the disc is there in the cpc-1-1-1.pov

>Some peculiarities are the
> distance of the sun (1.4 units) and the extreme color in the
> first version (30000 * White?)

i realised that real world measures won't work, as i was told " the scale of my
scene is somehow hitting a precision limit on POV-Ray implementation of photons.
Or perhaps it's just that it would need an insane count/spacing setting to work
at that distance" and (30000 * White?) i thought it might increase the
brightness of the light, so it would show more caustics.

> Also, using a sun position based on time is not suitable for
> testing purposes. You should try to make a simple repeatable scene
> based on the first scene with point area light, then use that light
> source at a position specified by sun pos, if that still works
> using the light_source from sun pos. don't change other parts
> such as landscape unless it works. do visualize the position
> of the sun as it might not be where you think it is.

interesting, i'll try and implement this approach thanks.

> Multifile samples are more conveniently provided as zip.

thanks, i uploaded the files as zip.

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