Just came across the Delta 3D engine a little while ago and thought I'd post a link to it here, as it looked like it might be useful for anyone looking for a free 3D engine for Blitzmax (assuming it's compatible).
http://www.delta3d.org/
It's currently only available for Windows and Linux but it's based on the open scene graph engine (link below) which has a Mac port so they may end up with a Mac version.
http://www.openscenegraph.org/
The engine is at version 1.0, it's free to use and open source (LGPL). Also, its development is fully funded and it's backed by the US military, so it hopefully shouldn't disapear up its own backside the way many open source (and some commercial) engines seem to end up doing.
http://www.delta3d.org/
It's currently only available for Windows and Linux but it's based on the open scene graph engine (link below) which has a Mac port so they may end up with a Mac version.
http://www.openscenegraph.org/
The engine is at version 1.0, it's free to use and open source (LGPL). Also, its development is fully funded and it's backed by the US military, so it hopefully shouldn't disapear up its own backside the way many open source (and some commercial) engines seem to end up doing.