So... there's no way to fix it other than just getting a video card with more VRAM? Mine's a GTX 1060 3GB and although while lowering the texture quality and spells kinda helps it only delays the unavoidable crash when alll VRAM is consumed.
No, the VRAM has nothing to do with it. Unab0mb's getting very annoyed with people who keep asking, and I can't blame him. The graphics driver is limited by the game engine to a 32-bit address space, which *theoretically* means 4GB max, but comes to about 3GB in practice. Throwing new hardware at it isn't going to make a lick of difference. The Team Avalanche and Project Edge folks know about this and are trying to come up with band-aids while the driver's memory management is improved, but for now this is the best advice we can give you:
1. Enable texture compression, and clear your cache any time there's an update to a graphics mod you're using.
2. Don't go manually editing the config files and twisting knobs you don't understand. We spent a lot of time trying to find the safest defaults (that's why things like PBO are default disabled)
3. Save early, save often.