Import Mesh Issue with Textures

I imported a map from blender (very big with several meshes) I got this error for every material (the map appears grey as all materials have the same issue). Any suggestions?

Hi TheSceriffo,

There’s two ways you can fix this:

The first is the most efficient - and that’s change the texture format to DXT-1/5 (from the Texture Editor) This does loose some slight detail though.
image

The other way is to change the TextureSampler type in the Material itself - change it to Linear Color - this keeps the textures at their maximum quality, but takes the most VRAM:

image

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Is there a way to do it for multiple mats? Because I have more than a hundred to change

You can change the texture format with the bulk edit tool - right click on all your textures (not NormalMaps, they should be in their own Normal Format) and choose the bulk edit tool:

Then in the options there you can change the format:

I’ve also got a tool on the marketplace that does that kind of thing with even less effort: