Can big maps work with 3D skyboxes

[Croc Snipe]

I'm just wondering how 0.0625 skyboxes can work with big maps like the ones that are super gigantic I just need to make the size of the normal size skybox and shrink it down to 0.0625?

 

[Pocket]

Hypothetically, if you're making a skybox that represents a larger area than the Hammer limits, you could just only build the part that'll fit, and then once it's shrunk down, add on from there. At that point, you can use what you already had as a guide for scaling.