I am planning to write an app that converts some scenes and objects from the 3D program LightWave to XAML (to be used in Expression) and would like to have some reference material.
For example I want to know how to represent 3D meshes, surfaces, animations. What are the tags/elements/attributes etc.
Is there a XAML reference manual?
Apparel1
There is no real set of elements defined for XAML. Instead, XAML is just a set of rules that govern the syntax of XML representing object graphs. The elements are simply class names, the attributes are just properties, etc.
Therefore if you're looking to understand what the XAML representation of a 3D model would be you really want to find the class that you would use and learn it's object model. I would start here.
HTH,
Drew