.RMT

From NFBSP

Used for James Bond 007: Nightfire DirectX 8 rendered materials. Because all of the files available of this extension are 0 bytes long, little is known about it. It is compiled by RenderMaterialCompiler.exe.

Edit by 2GoldenBullet$: All of the Nightfire demo's render materials are .RMT. I've found the main difference in .rmt and .rma are the version number and the extension. You can take a .RMT from the demo, change its version number with a hex editor and rename it to .rma and it will successfully be loaded in the release version of nightfire. This is the same with the RenderMaterialCompiler.exe, simply use hex editor to change the first byte from 18 to 19 and rename the extension to .rma and it will load