Christoph Hormann wrote:
> 
> You have to elaborate a bit more on that - the scene renders just fine
> here and i have no idea what this 'M' is meant for.

The idea is that M=1 limits all the reflected rays below 1.
The directly lit area is the brigtest and emits at intensity 1 which
should be ok even if there is clipping done anywhere.

M=51 should look equal to M=1 when M=1 image is adjusted to same
brightness. It doesn't so there is clipping present. You'll notice
the back wall intensity is clipped to 0.75. The corridor is also
darker.



_____________
Kari Kivisalo

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