White wall basic material interior lighting soft shade

Hi, I have a house .obj model (no vertex color, no material), which I would like to make into white wall, soft nicely shaded - something like this (ignore the furnitures)

I have been trying several combinations with ambient light and directional light, and mesh standard material with high roughness and mesh cast shadow, soft render lightmap, etc but nothing seems quite right. it is either too bright or the softness cannot be perceived.

am I missing anything or does the obj needs to be highly triangulated? Or if anyone actually has some standard settings they can advise, it will be very helpful as well.

many thanks!

1 Like

GTAO Post processing pass might help?
https://threejs.org/examples/webgl_postprocessing_gtao.html

thankyou for your reply, looks like it might work but not sure if it will be overkill. If I managed to get it to work, I will update again. Thanks!