There are no shadow in the POV version and AA behaves strangely. Here are
some suggestions that MIGHT improve things:

Lower the ambient.
Increase brilliance for checkered planes.

Use fade_distance and fade_power for the light_source. Set fade_distance to
1 and fade_power to 2. Use a high strength of light (rgb much over 1) to
compensate for the low fade_distance.

Converse_energy is probably important.

Small note about the shadow: It could be that Bryce has "caustics" turned on
by default. At least this keyword exsists in POV and will affect the shadow.
(Not to be confused with photons).

Keep us updated please.. You know, you can't leave us hanging in the air,
when the POV version still doesn't beat Bryce!

Regards,
Hugo

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