It's simple to download Creation Master 16 there you send these photos with the resolution it requires for example;
Then you extract from the master of Creation 16 himself an image rx3, but I belieeve that just adding the PNG format images
in the Creation Master 16 editor will work ad you won't need to compile those images for rx3 formating.
Do you have the Creation Master 16?
Yeah but Creation Master just doesn't run on my PC. I can't open the program at all!
Check your PM!