Optimizing map for game

Guys, i have one map which i want to open, my pc is ok to run it but problem is vram, i have not enough to run with 8k textures. So i really need to reduce texture resolution or map size, but literally can’t open it(just crash). What can i do?

go to the project folder using windows explorer, in there is a content folder, open the textures and resize them, if there’s a lot of textures you’ll want to use a program that has batch mode processing (xnview, irfanview, photoshop, etc.)