: Right-click Lumion in your Library > Properties > Set Launch Options > type -windowed .
The most common cause is an outdated or corrupt graphics driver. lumion failed to create dummy d3d9
Try launching Lumion again after closing these. : Right-click Lumion in your Library > Properties
: Lumion may be mistakenly trying to launch using your "Integrated" Intel HD graphics instead of your high-performance card. Error starting Lum2024 - "failed to create dummy d3d9" lumion failed to create dummy d3d9