We have updated our tutorial
https://rayfract.com/tutorials/ot0608.pdfto show 20 Steepest-Descent WET iterations with laterally averaged 1D-gradient starting model (Sheehan, 2005) and with Wavelength-Dependent Velocity Smoothing (WDVS; Zelt and Chen 2016) enabled at 90Hz. We discard WET smoothing after forward modelling to improve the WET resolution.
We use default Smooth inversion settings and default DeltatV settings to obtain the default 1D-gradient starting model. Also we use minimal WET smoothing and blank no coverage after last WET iteration.
For latest release notes see
https://rayfract.com/help/release_notes.pdf