Skyportal

Description
Skyportal is not a gameplay mod, but is intended as a modder resource.
Skyportal introduces 3D Skyboxes from Resurrection of Evil to Vanilla Doom 3.
Within the code I've produced a series of assets to help producing contents taking full advantages of this system.

3D Skyboxes are a good alternative to the normal 2D one. With this system you can render real 3D objects as skybox.
You have simply to create a room with what you want to show in the skybox, even monsters.
Then with some simple steps your little room will be enlarged 16 times on the skybox.

What this mean? You can create more detailed even animate skyboxes, with better performance and less pain to create a six side cubemap as
included there are skydomes that use 360° seamless sky textures of 1024x512.

Included in the zip there is a complete manual on how setup a 3D skybox and the relative entities, with map samples and scripts.

It uses a new DLL, so you can't add other mods that have custom DLLs. But the Source code is included in the zip, so you can change it
at your pleasure and port it on Mac and Linux.