This is the most common failure point. D5 Render is a renderer (similar to Unreal Engine). It does not rely on CPU rendering like V-Ray or Corona.
Open your design in your preferred modeling tool (e.g., SketchUp) and click the "Connect to D5 Render" button on the LiveSync toolbar. D5 will launch and automatically import your geometry while retaining your model's origin points. Step 2: Applying PBR Materials
This is where the "Work" part of your search comes in.