Seamless Sci-Fi Greeble Textures

Here are four more sci-fi greeble textures donated by Mr. Spacehead.  He donated them at 8k but I am struggling to host them that large, so here are 4k versions for now.  Each greeble texture has a displacement map and normal map that corresponds with that texture.  These are all seamless and are great for creating 3D spaceships and other sci-fi objects in Blender or other 3D software.  Enjoy!