Compatibility
The Twikit Unreal Engine plug-in is built for specific engine versions. Using the plug-in with a version it was not compiled for will result in a startup warning ("plugin incompatible, do you want to compile…"). Compilation from source is not supported and the plug-in will not load. See the Installation page for the list of supported versions.
Scaling
TwikitActor has its own Scale property in the Twikit section. Always use this to scale the model — do not use Unreal Engine's built-in actor scaling.
Using the built-in scale reactivates undo information on the underlying procedural meshes, which makes moving the actor slow. There is no way to recover from this other than deleting and recreating the actor. The Twikit scale property does not have this issue and allows scaling the actor while keeping it fast.
Properties
In game mode, user inputs for the selected TwikitActor are shown in the top-left corner. A property is only shown if both of the following conditions are met:
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If the product contains parameter groups, the property must belong to a group.
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The property must be set to visible.
Troubleshooting
The properties window does not appear after starting the game
There are two common causes. First, try from a blank Architecture or Automotive project template — the blank Game project is known not to work because its player controller overrides the Twikit player controller, preventing actors from being selected. Second, check whether the product actually has any visible properties in a group; see the Properties section above for the exact requirements.
Unreal asks me to compile the plug-in when I open a project
You are using the plug-in with an engine version it was not compiled for. Verify that the downloaded plug-in matches your version of Unreal Engine. See the Installation page for supported versions.