To ensure Windows drops old routing rules immediately, clear your network cache: Press , type cmd , and press Enter.
Clear 127.0.0.1 entries containing "lumion" from C:\Windows\System32\drivers\etc\hosts . Exclude Lumion.exe from Firewall/Antivirus. Set Dedicated GPU to "High Performance". Enable Raytracing for maximum quality.
| Myth | Fact | | :--- | :--- | | "Deleting the host file entries restores full quality." | Partially true—but only if you own a license. Otherwise, the trial watermark appears. | | "You can use a VPN to bypass the check." | False. Lumion reads the local hosts file before any network traffic. | | "Lumion 2023 high quality is possible with a patched hosts file." | False. Critical render kernels are validated server-side. | | "The error means Lumion is spying on my PC." | False. It only scans its own activation paths, not your files. | lumion 2023 host file entries detected high quality
Inside Notepad, click in the top menu, then click Open .
: Delete those specific lines, save the file, and restart your computer. Why High-Quality Rendering Requires a Clean Connection To ensure Windows drops old routing rules immediately,
: Delete any lines that contain the word "lumion." Do not touch other lines unless you know what they do Save and Restart : Save the file (ensure it doesn't have a extension) and restart Lumion For further assistance, you can consult the Official Lumion Support Knowledge Base regarding antivirus and firewall conflicts. Are you seeing this error with a subscription license or during a trial installation How do you resolve antivirus and firewall problems?
Deep Dive: Lumion 2023 Host File Entries Detected When launching , you may encounter an error message indicating that "Host file entries were detected." This typically occurs when your computer's hosts file contains specific lines that redirect or block Lumion’s ability to communicate with its official license and update servers. Why Does This Happen? Set Dedicated GPU to "High Performance"
Lumion 2023 has performed a checksum or scan of your hosts file during startup and found entries that reroute its activation servers. As a result, it refuses to launch—even if you intended to use a legitimate license but previously applied a crack or patch.