I’m referring to the architectural demo from Epic.
Lightmap’s resolution is about 1024x1024… small objects I used 256x256 or 512x512
I imported walls and floor as one mesh and then small objects each by each.
I placed the spotlights at windows. I thing the secret is in changing the indirect illumination values from each light. The color is also important to give more realism.
In “world setting” window, I changed the “static lighting level scale” to 0.15. This works like the “sample size” from vray’s lightcache. The building times will increase a lot, but the shadows from indirect illumination will be
more stronger and realistic.