Terrain_Import:

Terrain_Import comes in two flavors: As an operator that directly generates polygons and as a FX Tree node that generates a greyscale raster that could be used as an amplifier for a push operator or as a displacement map. Both utelize GDAL as an abstraction layer and thus support a multitude of source formats.

Installation:

Terrain Fx-Tree UFO node
Terrain Import operator

Put the FLX_Terrain.dll in C:\users\%YOURUSERNAME%\Softimage\%XSIVERSION%\Application\Plugins
The FLX_Terrain_Ufo.dll goes to C:\users\%YOURUSERNAME%\Softimage\%XSIVERSION%\Application\fx\ufos
You might have to create the fx and ufos folders if you have never installed any UFOs so far.

Quick start:

Get the UFO from FX Tree->Ops->Plugins[U]->Terrain Import
Get the COP from File->Import->Import Terrain

:: Both import most of the GDAL raster formats.
:: No vector formats, no DXF as of yet.
:: For SDTS rasters make sure to pick the CATD.DDF file.
:: On the second tab of the operator you have the option to log out detailed file information to the history pane.
:: There is also a standalone command to log file information. FLX_Terrain_Info( "C:\1003CATD.DDF" )

Formats:

GTiff GeoTIFF
NITF National Imagery Transmission Format
HFA Erdas Imagine Images (.img)
SAR_CEOS CEOS SAR Image
CEOS CEOS Image
ELAS ELAS
AIG Arc/Info Binary Grid
AAIGrid Arc/Info ASCII Grid
SDTS SDTS Raster
DTED DTED Elevation Raster
PNG Portable Network Graphics
JPEG JPEG JFIF
MEM In Memory Raster
JDEM Japanese DEM (.mem)
GIF Graphics Interchange Format (.gif)
XPM X11 PixMap Format
BMP MS Windows Device Independent Bitmap
Leveller Leveller heightfield
Terragen Terragen heightfield
PNM Portable Pixmap Format (netpbm)
DOQ1 USGS DOQ (Old Style)
DOQ2 USGS DOQ (New Style)
ENVI ENVI .hdr Labelled
EHdr ESRI .hdr Labelled
PAux PCI .aux Labelled
MFF Vexcel MFF Raster
MFF2 Vexcel MFF2 (HKV) Raster
FujiBAS Fuji BAS Scanner Image
GSC GSC Geogrid
FAST EOSAT FAST Format
BT VTP .bt (Binary Terrain) 1.3 Format
LAN Erdas .LAN/.GIS
CPG Convair PolGASP
IDA Image Data and Analysis
NDF NLAPS Data Format
DIPEx DIPEx
ISIS2 USGS Astrogeology ISIS cube (Version 2)
PDS NASA Planetary Data System
L1B NOAA Polar Orbiter Level 1b Data Set
USGSDEM USGS Optional ASCII DEM (and CDED)