Mike Simpson hat auf seiner Seite den Freeware TGPCDX-Viewer veröffentlicht.
TgPcDx file viewer
------------------
The latest models from RSC use a new compressed .tgpcdx format
for which, as far as I know, there are no direct file viewers available.
The latest RSBinTools will display these files, but apparently not from
within Windows Explorer or Directory Opus by simply clicking on them. This
viewer allows you to do this, although it is admitted that viewing larger
files such as 2048*2048 is slow and 4096*4096 is very slow.
Das bekommt man mit den RWTools genauso hin.