Convert rla to dds Online: rla2dds
You can use Tom's Editor to easily convert images from
Alias/Wavefront image file .RLA to Direct Show Surface
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Alias/Wavefront image file is an image format with extension RLA.
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.