ResInsight supports the following type of ROFF input data:
*.ROFFASCcontaining data from RMS as Roxar Open File Format (ROFF) in binary or ascii format.
Roff Data can be imported from File->Import->Roff Grid Models->Import Roff Case menu. Select a grid file and additional files with properties in the import dialog. The grid will be displayed and used in the same way as an Eclipse grid model.