This is a RPC file created with RPCCreator from Archvision. RPCs are actually 2D images that simulate 3D. This format can be used with various software like Revit and 3DStudiomax.
But the textures of the RPC, including an opacity map, can also be used in 3D softwares like 3DS or C4D, to create materials or in 2D Design software like Photoshop to make photomontages.
Thuja occidentalis is an evergreen coniferous tree, in the cypress family Cupressaceae. Also known as arborvitae ( tree of life ) pr more commonly white cedar or yellow cedar.
RPC files only shows in 'Realistic' mode or in 'Rendering' in Revit. They don't show in wireframe or hidden line or shaded view because they are not composed by polygons.
The problem in Revit is that , being a BIM software, the 3D trees have a limited amount of poly (unlike 3DS Max) and look really bad.
So you either use bad 3D trees, or put an RPC that 'simulates' 3D but is actually a 'rotating' 2D image that orientates with the camera view.
RPC are in fact used only for render purposes, they also work a little bit in 3D animation. Not being a real 3D, but a 'rotating' 2D image, they look strange when we go all around them, but look fine when the animation movement is parallel.