topic Re: Geometry problems when exporting from CityEngine to Twinmotion in ArcGIS CityEngine Questions

Geometry problems when exporting from CityEngine to Twinmotion

JulesChasson — Mon, 29 Apr 2024 10:17:48 GMT

Hello,

I'm new to CityEngine, and i created a rule that allows me to generate houses from footprints. I would now like to export them from CityEngine to Twinmotion, but when i do, the walls of the house disappear. The models are exported in udatasmith format. I put screenshots below for you to see the issue.

Here's my cityengine models :

And here are the same models exported in Twinmotion :

Thanks in advance !

Re: Geometry problems when exporting from CityEngine to Twinmotion

JonasObertuefer — Thu, 02 May 2024 07:14:39 GMT

Hi @JulesChasson,

Welcome to CityEngine, your rule looks cool!

To further look into your issue can you share the export settings used and the rule file with us? If you don't want to share the rule in this thread you could also send me a DM.

Best
Jonas

Re: Geometry problems when exporting from CityEngine to Twinmotion

JulesChasson — Thu, 02 May 2024 08:10:56 GMT

Hi Jonas,

Thanks for your answer.

Here's my export settings :

You can find the rulefile aswell, however i zipped it because the cga format was not supported.

Thank you for your help !

Jules

Re: Geometry problems when exporting from CityEngine to Twinmotion

BenjaminNeukom — Mon, 06 May 2024 16:08:09 GMT

Hi @JulesChasson

Could you try setting the Material to "two sided" in Twinmotion and check if that solves the problems?

(Using the material picker and then setting the Two sided flag in the Misc. category).

Currently the double sided material flag is not propagated to the Datasmith format from CityEngine.

Let me know if that helps!

Best,

Benjamin