Bug in Metrics Simulation

[Daniel Haas]

Ran into a discrepancy in data, maybe a bug, wondering if anyone else
has experienced this. When running a Visualization accounting for
daylight (and considering all things equal: camera view interior
looking out, materials, date, time, clear sky conditions and quality),
Diva outputs similar data for frosted/fritted glass surfaces that have
direct exposure to daylight whether using individual or sequence. For
interior surfaces receiving reflected light, cd/m values vary between
individual and sequence. In particular interior surfaces calculated
during a sequence method appear darker than during a singular
visualization. Based on the results it would appear that during a
sequence less bounces of light are calculated or material reflectances
are not fully rendered. Any thoughts on why this may happen or if
there is a fix would be greatly appreciated.

Similar discrepancies of interior surface brightness in cd/m were also
experienced when selecting the EvalGlare option.

Thanks

[Kera Lagios]

Hi Daniel,

Yes. There is a bug in one version of DIVA relating to the issues you mentioned, because the ambient file is being written incorrectly.  

Alstan proposed a solution:

For now, a reasonable thing to do would be to find-and-replace the "-af filename.amb" portion in the batch file (*filename*img.bat) with nothing, and then re-run the batch file manually (by double-clicking on the *filename*img.bat file). This should not pollute your image's ambient data.

Thanks,

Kera

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