For a simple demonstration of automating a SOLIDWORKS Visualize render, inspect the IVisualizeAddinManager VBA example.
We also provide a more advanced sample plug-in with events and handlers that you can customize to control the render automation as you see fit. Inspect Knowledge Base Article QA00000339144 (see the Knowledge Base tab of 3DSupport App) to download SOLIDWORKSVisualizeAPISamplePlugin.zip.