LUMOS surfaces

[Alfie58]

I have a hexagonal room (8 surfaces incl walls, roof and floor) and an object consisting of 3 stacked boxes of different sizes sitting on top of each other, 18 surfaces). The luminaire is against on the the walls of the room. I would expect the simulation to run for 8+18=26 surfaces. In fact the simulation indicates it is working through 27 surfaces. I am guessing that the single room metric I have counts as the 27th. Is that correct?

The box surfaces are allocated as 'white' material. This means that part of the top surfaces of the lower boxes are largely 'hidden' by the box above, and part of the surfaces are 'unhidden'. Would one expect LUMOS to simulate the variation of irradiance across such a top surface? My aim is to measure irradiance at the unhidden part of the top facing surfaces of each of the stacked boxes. Since it takes a long time for the simulation - I thought I'd ask before working on this.

[Frudawski]

The metric should indeed count as an additional object to calculate, but sometimes surfaces with zero m² can occur during room creation, which is not an issue for the simulation.

The partly hidden surface should correctly be simulated: partly exposed and partly hidden, but the quality of the results strongly depend on the mesh density settings. I would recommend a higher density setting to better capture the irradiance gradient on the surface in question.