Hello everyone,
For anyone still experiencing performance degradation between Twinmotion 2022.2.3 and 2023.1 Preview 2, please submit a bug report here and share a copy of your original 2022.2.3 Twinmotion file, and the converted 2023.1 Preview 2 file. Make sure these files are packaged with the Resource Collector (Edit menu > Resource Collector > Compress files) so all relevant data is retained when sharing. THis will allow us to determine what might be causing the continued performance degradation.
Best,
Raghib