A method is provided for rendering a scene including a digital three-dimensional (3D) model of a structure. The method includes traversing a scene graph composed of a hierarchical group of nodes representing respective 3D objects of the digital 3D model, and selecting nodes of the hierarchical group of nodes. The method includes adding a plurality of objects represented by the selected nodes to a render queue, performing a multiple-pass rendering of the plurality of 3D objects from the render queue. This includes in a pass of a plurality of passes, rendering a threshold portion but not all of the plurality of 3D objects to a framebuffer for output to a display device, with at least one of the plurality of 3D objects being left in the render queue after rendering the threshold portion. The method may also include a mesh simplification and/or z-occlusion.