1. Here's why
This problem is caused by one of the following reasons:
- The screen resolution is too low.
- Or custom app scaling is applied in Windows.
2. Check if the screen resolution is too low
2.1: Close Lumion
2.2: Right-click on an empty area of the Desktop and pick ‘Display settings’:
2.3: Change the ‘Display resolution’ to 1920 x 1080:
3. Check if custom app scaling applies
3.1: Close Lumion
3.2: Right-click on an empty area of the Desktop and pick ‘Display settings’:
3.3: Select ‘Advanced scaling settings’:
3.4: Turn on the ‘Let Windows try to fix apps so they’re not blurry’ option: