any chance to implement mo3 file-format? when exporting all effects are disabled, and when editing in renoise there should be a ‘play as mo3’-file button (just disables all non-compatible effects) 
sorry, let me dream…
mo3 is a format which saves IT, XM, S3M, MTM, MOD files with MP3-encoded samples, so it cannot be used into ReNoise for saving, since ReNoise only saves RNS modules.
If you just want to load MO3 files into ReNoise, you could use the MO3 decoder.