Since yesterday RT also supports the compressed RAW-files of X-T2 and X-Pro2. It’s still a test version, but working fine for me and some others so far. You need to compile RT from the GitHub-branch “xtranscompressed” to get this feature, but I think it shouldn’t be to long till it is merged to the normal GitHub-branch. More info here: Fujifilm compressed raw support - X-Pro2 & X-T2 · Issue #3229 · Beep6581/RawTherapee · GitHub