Twinmotion 2016 — System Requirements

: 4 GB VRAM, compatible with DirectX 11 or 12. Examples include the NVIDIA GeForce GTX 770 Go to product viewer dialog for this item. ATI Radeon R9 280X Go to product viewer dialog for this item. Disk Space : 5 GB available. Simply Rhino Technical Usage Notes Internet Connection

This is where mistakes happen. Twinmotion 2016 is but not computationally heavy: twinmotion 2016 system requirements

For a smoother experience—especially if you intend to produce high-resolution videos or use the "BIMmotion" executable files—you should aim for these specifications. Windows 10 (64-bit) : 4 GB VRAM, compatible with DirectX 11 or 12

⚠️ Twinmotion 2016 does not support macOS or Linux. It also doesn’t support real-time ray tracing (that came much later). Disk Space : 5 GB available

Are you planning to run on a specific older machine, or are you trying to get it to work on a modern system ? Hardware and Software Specifications for Twinmotion