LIG

Files with a ‘.lig’ filename extension are native Ligno3D Designer files.  When you save your current project to a LIG file, all aspects of the project are recorded, so that it is reproduced exactly the next time the file is opened.  LIG files are binary files, intended to be produced and read by L3DD only.

BMP

L3DD reads ‘.bmp’ bitmap files as textures, and can also write the current 3D view to a high resolution BMP file.  BMP files used as textures must be square, and their pixel dimensions must be powers of 2 -- e.g., 16x16, 32x32, 64x64, 128x128, 256x256, etc.

STL

L3DD can import and export the ASCII version of STL files (not to be confused with ‘Certificate Trust List’ files).  STL files are ‘stereolithogaphy’ files used in rapid prototyping of 3D models.  They can also be used as a simple CAD interchange medium.  In STL files, all faces with more than 3 sides are subdivided into coplanar triangular facets.  Not all L3DD objects (e.g. House) translate correctly to STL files, so you may have to modify an object before exporting it to an STL file.  See http://www.sdsc.edu/tmf/Stl-specs/stl.html for STL requirements.

DXF

L3DD also imports and exports minimal DXF files, widely used as a CAD interchange medium.  L3DD recognizes 3D faces, lines and points, but all other data types such as text, textures, and proprietary solids are ignored.  DXF files exported by L3DD can be read by programs like AutoCAD® and TurboCAD® – and vice versa.  Only the basic 3D geometry is exchanged.  L3DD partially imports DXF files that are too big to handle – e.g., the Sydney Opera House & Bridge sample that comes with AutoCAD® 2002.

  In the basement of the Sydney Opera House, ex AutoCAD® DXF file.