# Demo scenes are broken

**URL:** <https://forums.chaos.com/t/demo-scenes-are-broken/185095>\
**Category:** General\
**Created:** [May 31, 2026, 7:46am UTC](https://forums.chaos.com/t/demo-scenes-are-broken/185095 "2026-05-31T07:46:43Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dgrigo](https://avatars.discourse-cdn.com/v4/letter/d/f6c823/32.png) [@dgrigo](https://forums.chaos.com/u/dgrigo)\
**Post date:** [May 31, 2026, 7:46am UTC](https://forums.chaos.com/t/demo-scenes-are-broken/185095/1 "2026-05-31T07:46:43Z")

</div>

Hello, first post

All demo scenes are broken one way or another,

80’s\_disco :

don’t have Vray proxies at all loaded for VRayProxy@b7f3203a\_3dh\_Bus\_Stop\_44-17 , VRayProxy@b12f0930\_3dh\_California\_Palm\_Tree\_110-61

caustics progressive

ERROR V-Ray: Failed to upgrade V-Ray Proxy VRayProxy@6252cb11\_3dh\_Headphones\_001. Error: Cannot assign a ‘str’ value to the existing ‘previewType’ Int IDProperty

plus the paths for them are absolutes C:\Users\Nikolay\Scenes\Blender\Pool\_Caustics\Assets\6252cb11\_3dh\_Headphones\_001.vrmesh

even changing them by pointing to assets they still not render

Isometric bathroom:

ERROR V-Ray: Failed to upgrade V-Ray Proxy VRayProxy@Rug\_Round. Error: Cannot assign a ‘str’ value to the existing ‘previewType’ Int IDProperty

Isometric kids bedroom

Invisible VRayProxy@Rug

and so on for all scenes, qc is not happening ?

Frustration till understand whats happening

Thanks

Konstantinos