Convert lum to pnm Online: lum2pnm
You can use Tom's Editor to easily convert images from
Technicolor Dream .LUM to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Technicolor Dream is an image format with extension LUM.
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.