Visit the official Microsoft download page for DirectX End-User Runtime Web Installer . Download and execute the installer package dxwebsetup.exe .
Download the latest driver installer directly from the NVIDIA, AMD, or Intel website. Run the installer. Select . lumion failed to create dummy d3d9
Under Graphics performance preference , click and locate the Lumion.exe file (usually in C:\Program Files\Lumion [Version]\ ). Visit the official Microsoft download page for DirectX
Keep your GPU drivers updated and avoid running intrusive overlays while working in Lumion. Run the installer
Check for blocked Lumion files and restore them. Go to Virus & threat protection settings > Manage settings . Under Exclusions , select Add or remove exclusions .
Visit the official Microsoft download page for the . Download and run the dxwebsetup.exe file.
If none of the above solutions work, you may need to reinstall Lumion. This ensures that no program-specific files are corrupted.