I’m running a series of 3PM daylight studies and 2PM façade radiation studies, in the same fashion as presented in: https://www.radiance-online.org/learning/tutorials/matrix-based-methods
Hence for illuminance based simulations I run:
gendaymtx -O0 xxx.wea > xxx.smx
… (rfluxmtx, rfluxmtx, dctimestep)
rmtxop -fa -c 47.4 119.9 11.6 xxx.rgb > xxx.ill
And for the irradiance based simulations I run:
gendaymtx -O1 xxx.wea > xxx.smx
… (rfluxmtx, dctimestep)
rmtxop -fa -c 0.265 0.670 0.065 xxx.rgb > xxx.wm2
Since I’m only interested in illuminance and irradiance, color information can be neglected. Post processing in only one channel enables me to speed up the dctimestep- rmtxop-daylightmetrics computations, due to the smaller matrix/vector sizes e.g. making a CUDA based implementation.
The default settings of the gendaymtx sky color is: “-c 0.960 1.004 1.118”. There is an example with “–c 1 1 1” yielding an uncolored sky, but what is the constraints on the “-c” settings in gendaymtx when it should yield a proper energy balance? And subsequently how is “-c 0.960 1.004 1.118” derived?
Any help understanding this is highly appreciated.
Best regards Tobias