1. Here's why
Freezes and crashes during rendering may occur if your Project is 'too complex' and your hardware isn't powerful enough and/or lacks available System Memory and Virtual Memory to handle it properly.
'Too complex' refers to the following variables:
|A: The number of different models you have added to the Project.|
|B: The 3D Point count in the top right corner of Build Mode.|
|C: The number and resolution of your textures/materials.|
|D: The Movie/Photo Effects you're using, in particular the Skylight and Hyperlight effects.|
|E: How many Reflection Planes you've added to the Reflection Effect.|
|F: How many Spotlights are set to Shadows: Dynamic in the Scene.|
|G: How many Spotlights you have selected in the Global Illumination Effect.|
|H: How many large surfaces you have assigned 3D Grass Materials to.|
1.1: To improve performance and reduce the time it takes to render a Photo or a Clip, you should try to reduce the number of all of the above. See this article for suggestions:
- Knowledge Base: How can you improve performance within Lumion?
1.2: In addition, increasing the amount of Virtual Memory in Windows will also help prevent crashes:
- Knowledge Base: How do you change the amount of virtual memory in Windows?
1.3: If the problem persists, please verify that your PC has an adequate power supply unit:
- Knowledge Base: Which power supply do you need?
1.4: Alternatively, you could consider upgrading your hardware: