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1. Minecraft version: 1.12.2.
2. Galacticraft version: 4.0.2.280.
3. GalaxySpace version: 2.0.18.
4. AsmodeusCore version (for 2.0.1 version and above): 0.0.30.
5. Side (Single player (SSP), Multiplayer (SMP), or SSP opened to LAN (LAN)): Singleplayer.
6. Other add-ons: None. Other mods are in use, but I can confirm this is ocurring even without other mods, besides GS and its required mods.

Description of the issue:
GoG's skybox flickers while this mod is in use.

Screenshot/Video:

I don't know how to make videos. I'm not a YouTuber. Just imagine the skybox flickering a lot.

Attached log file (or url on pastebin.com):
N/A