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Open your model
Open a glTF model to apply materials to its surfaces.
Export glTF binary (.glb) from SketchUp, Rhino, Revit, Blender or Twinmotion.
Click a surface to select it. Alt-click selects a single object. Drag to orbit, right-drag or Shift-drag to pan, scroll to zoom.
Mark up a rendering
Load a still rendering, or use the current 3D view. Draw zones over surfaces and tag each one with a material.