Our latest tutorial

http://rayfract.com/tutorials/TYLERLN1_2019.pdf

shows karst imaging for a line which we interpreted in 2006 already. Also we link to GeoTomo LLC interpretation which has been published and is similar to our output. See

https://www.slideshare.net/oncel/sinkhole-geophysics

For an objective comparison of available refraction tomography software see

http://rayfract.com/pub/Zelt_etal_JEEG.pdf

For our latest release notes see

http://rayfract.com/help/release_notes.pdf

We now better support importing of streamer-recorded SEG-2 formatted data with custom/irregular spacing of traces. Also we import true x/y/z coordinates specified in the SEG-2 trace headers.