Am 23.08.2018 um 02:36 schrieb Jim Holsenback:
> well i'm kind of chasing my tail so i thought i'd ask for some guidance.
> i'm using radiosity and a very dim point light to get some shadow
> action. check out the lower left hand corner of the image. that's what
> i'm shooting for! why don't the other spheres have the same affect?
> other that the color there's no diff...the emission component is the
> same level for all the colors. is it more about the emission of the
> object or the surface that is showing the affect.

Looks to me like a radiosity setting issue, with too low sample density.

In the bottom left corner, by chance a sample was taken very close to
the base of the green... tron unicycle?... and picked up the emission
very nicely, while all other samples were taken comparatively far away
from the gizmos.

There are various knobs you might try tweaking here, but my personal bet
is that `error_bound` is set too high. You'll probably want a value of
0.5 or even lower. The default of 1.8 certainly won't cut it.

In reducing `error_bound` you may find that the result looks unnaturally
splotchy. If it is a general effect, try increasing `nearest_count`
and/or `count` to compensate. If instead (or after you adjust
`nearest_count` and/or `count`) the splotchiness is limited to nooks and
crannies, try reducing `minimum_reuse`.

Reducing `error_bound` (and, in some cases, increasing `count`) may also
introduce block-like artifacts. Those should be easy to fix by reducing
`pretrace_end`. A too high `pretrace_end` may also prevent changes to
`nearest_count` from being fully effective.

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