Help me with orca 3D

How can I download and install Orca on my Rhino 8?

Hello vinh. With Rhino v8, you need to install the latest Orca3D V3, available for download here: https://orca3d.com/pages/version3

Note the following with regards to running under Rh8:
To run in Rhino 8, right-click on the Rhino 8 desktop icon, select Properties, and add /netfx at the end of the target so that it reads “C:\Program Files\Rhino 8\System\Rhino.exe” /netfx and then always start Rhino using this icon (don’t double-click a .3dm file). This will need to be done each time you update Rhino 8.

Let us know if you need further help

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