There are a couple different ways to go from Modo into Previzion. Each method has it’s benefits and limitations.
Collada > Previzion
Using COLLADA 1.4.1 will produce a .dae file in your chosen directory. Using this method you will give you freedom to modify textures after export, because the textures are not written into the .dae file. To get this file to work in Previzion it must be located in the same directory as the images you are using.
FBX > Previzion
In modo 701 you are able to export an Autodesk FBX 2010 format. Use this option and all textures will be embedded into the .fbx file. This will only carry through textures, and excludes any complex materials with alphas, reflections, etc.
FBX > Maya > Previzion
In modo 701 you can export the Autodesk FBX 2010 or in 601 you can output Autodesk FBX 2006.11. Import this into Maya and apply cgfx shaders for complex materials and export as you would an FBX from Maya.