Just a little thing i did out of boredom.
I recompiled a few standard props with smaller scale to fit into skyboxes.
Download contains a mini prop zoo map for reference.
All new models are in props_skybox folder.
Note: all security_fence models were skyboxified. 512 unit long skybox fence is already available under props_gameplay in vanilla game, so I skipped that one. All others are in props_skybox.