Convert rm3 to dds Online: rm32dds

You can use Tom's Editor to easily convert images from
Rambrandt .RM3 to Direct Show Surface .DDS.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

RM3

Rambrandt is an image format with extension RM3.

DDS

DDS are files invented by Microsoft to be used in games, mostly as textures. Images can be compressed to save space but the compression methods defined by DDS are all very fast in terms of coding and decoding.