Select object > right click > object proporties > "backface cull" Be careful adding modifiers to the stack. Dont go crazy on it. To fix it without a modifier select object in editable poly or mesh modes, select "face" subselection on the tool panel on the right and there will be a "flip" button. Select all the faces that…
@Mane I understood your problem because i also encountered the same problem where you could not change the color of the object and x ray mode also does not work. So here's the Solution = Select Object and then right click and then go to object properties and then in general section By Layer will be turned on so switch it…