Shut off material lighting at runtime

Is it possible to shut off the lighting for a material at runtime? I’m trying to copy the material, shut off its lighting, then use it for my level editor preview so it’s easy to see what you’re placing. Is this even possible? Currently I’m just using an unlit texture shader and copying over the material onto the mesh,but I really don’t like that approach as I want a 1:1 appearance except it needs to ignore lighting.

use a culling mask which ignores lighting.

I’m using Graphics.DrawMeshNow, tags have no relevance so a culling mask isn’t going to work. Only the shader, material, and textures are relevant.