Whenever I load a material, custom or otherwise, it gives me these weird black spotty liney things all over which change when I move around
Must be something in that material itself. None of the other materials in the scene are acting up. Can we see the material graph?
It look like the cube has double vertices, try to apply the texture to a pallet mesh
Sure. I’m pretty new to unreal, so, if there’s something wrong, I’m not surprised.
Is the texture sample plugged into the Roughness pin simply a solid white color? no detail or texturing to it? Try using a scalar parameter instead, with a default value of 0.5, and min=0, max=1. Then create a material instance from the material, and apply that material instance instead of the original.