Convert sun to dds Online: sun2dds

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

Go to Tom's Editor

SUN

SUN Rasterfile is an image format with extension SUN.

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.