Repeating Honeybee Simulation Results in Different Shortwave MRT Delta Everytime

grasshopper honeybee
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Hey @charlie.brooker,
Thanks for the recommendations regarding radiance parameters, my knowledge about the details are not quite much at all. I thought I’d follow the recommended parameters for accuracy here: SETTING RENDERING OPTIONS

Here is a screenshot of the model:

Model
Model1221×720 164 KB

So basically, I am doing simulations at 1 point in the middle of the canyon, the ground and canyon buildings are modelled as HB rooms, you can see the ground surface is cut into 1*1m grid, the building surfaces is a bit larger.

For time issues, I modelled all rest of surrounding ground and other context buildings as ‘Context’.

I will try to look into everything you said here, and see how it goes.

Thanks a lot.

Best,
Regwan