Convert rys to pnm Online: rys2pnm

You can use Tom's Editor to easily convert images from
Mamut .RYS to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

RYS

Mamut is an image format with extension RYS.

PNM

PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.