please tree on left, why the black square is not rendered?
What version are you using exactly (e.g. 5.1.234)? Also, are you using NR? If so, what NR version?
KS 6.2.85
not using network rendering
any thoughts?
Try updating to the latest (Help>Check for updates...). If that doesn't help, try using max time or samples and send us the scene to investigate: support@luxion.com
To save a ksp file:
1. Open your scene
2. Go to File > Save Package
3. Name your file
You can send the file securely via our WeTransfer: www.keyshot.wetransfer.com
I've had this issue with (beta) 6.2.105. It's usually material related, but for me it also affects the backplate. Rex suggested max samples or max time. I ran a "full regular render" to determine time, and then chose 10 minutes maximum time (on 32 cores), and it rendered fine. I know the KS Team is working on this.
Bill G