ArchViz rules UE5

Content:

LUMEN

Сommand for console -> r.lumen.visualize.cardplacement 1 to check lumen best outcome

Result: using walls with thickness and separate meshes is the best way. Walls without thickness and with separate meshes are the second best choice.

Show -> Lumen -> Surface Cache to check the light cache. Pink color indicate bad light propagation
Using Lumen in UE5 you don't need to create lightmaps for objects but you still have to unwrap objects (UV). However, don't forget to check normals.

SCALE

Realistic scaling playes an important role in the photorealistic visualization. It's a psychological trap. Our brain will not believe the scene is real if it doesn't follow the scale rule. You need to follow all the metrics and check the scale of each object.

TEXEL DENSITY

Texel Density explanation

SHADOW BOX

It's usefull to create a shadow box in the scene around the building to block any penetration light through the cracks in the scene but consider to leave windows opened for the environment light (make holes in the box). Without shadow box the scene will look bad.

COLLISIONS

Use simple collisions to enhance the performance. Complex collision causes complex callculations.