Hiya Tyler. I doubt I'm making much sense here, but here it is for what it's worth.
Evo1 terrain is 256x256 16-bit greyscale, mtm2 terrain is 256x256 8-bit greyscale, when TxRaw finds a 16-bit one in the data folder it converts it to 8-bit as it displays it. As far as 16-bit greyscale raws go Photoshop is the one program best suited to opening them, as most other programs don't support them.
As for converting Evo1 tracks, all of the bases have been covered elsewhere, the texture layouts are done, as linked above, and models/boxes can all be converted perfectly using the box converter. Once converted, and the models changed to bin, I would put it right back in the evo1 sit file, in the folder where I'm using TrackEd3. Because.... I use TrackEd3
exclusively for setting models in mtm2 tracks now, by comparison, setting models in Traxx is like hammering nails with a screwdriver - the perfect tool for a job just can't be beat. However, this means you have to split development, working models in TrackEd3 and Everything else in Traxx, if you clone TrackEd3 models in Traxx their precision alignment will get totally messed up. Negativity aside, you can of course take the box (models) data converted from the original evo track, place it within the sit from your traxx made pod, then clone it with traxx to have a mostly converted track, you'll just have to tweak each model in Traxx yourself afterward. Anyway, in the end, in working in TrackEd3, the boxes portion of sit file can be converted once again and placed directly in the mtm2 pod and sit files created by Traxx. It's tricky, and takes more effort, but if building stuff with models is your thing then the highly precise hardware rendered environment of TrackEd3 can't be beat. Just bear in mind the current population of the world is projected to be 6,362,720,422 people, and since I'm apparently the only one on earth who takes this route in making MTM tracks, that makes me a one in six billion kinda nut.
http://mtm2.com/~trackville/tracked3/boxconvert.zip
http://forum.mtm2.com/viewtopic.php?t=1986
http://forum.mtm2.com/viewtopic.php?t=1989