Hey there,
I've imported a model and changed the scene units to reflect the units used in our CAD software. The problem is that in KeyShot the floor grid is still way too large. I can obviously scale down the model so the ground grid doesn't have so many subdivisions in relation to the model, but I'm not longer using the units that the model was created in.
The reason I ask is because I'm assuming that shadows and lights will interact strangely with such a large environment.