Texel density/Texture atlas

Ingsoc75

We are doing an F-16 maintenance trainer in Unity (1st person) that will be used on desktop machines (no higher than 1080 resolution).

The scene consists of a HAS (Hardened Aircraft Shelter) with an F-16 in it (not very large area, about 25 meters x 16 meters). 

The user can go anywhere in the scene (so everything has to be detailed texture wise). 

The fuselage and wings are broken up into 2 4K atlases but little things like text still look blurry. Other objects on the F-16 are broken up into their own textures. 

Should I keep breaking up the body/fuselage into more than 2 atlases to increase texel density until I get a desired result?

Obscura

Check out decals / mesh decals.

Ingsoc75

Will that work for other details like rivets and other things that I would paint as normal/height data in Substance Painter?

Obscura

When you use mesh decals, you would use those details as small floating polygons uv-d to an atlas texture that contains all the shapes you need. So in that case you wouldn't paint them into the normal map in Substance. But it would give you much higher resolution on these details, and other decals. Star Citizen use this technique extensively. Search for Star Citizen decals here on polycount.

Ingsoc75

Thanks Obscura. 

I posted a followup here