I'm trying to create a dust field using a bunch of textured planes that I want to orient to face the camera. I'm exporting the mesh from Blender and adding the BB:: prefix to the name so the DAE importer automatically sets it to billboard. In game, the mesh is invisible unless I disable billboarding (or enable Z-axis billboarding which works but isn't the effect I want). If I go into wireframe mode I can see a thin line where the mesh should be, almost like the code is turning the mesh on its side and I'm looking at it from one of the edges.
I've tried everything I can think of - changing the 'up' axis on import, flipping normals, rotating the mesh before export... nothing seems to make a difference.
Anyone have any experience setting up DTS billboards?