Implement to create your own custom preview. Custom previews are used in the preview area of the inspector, primary editor headers, and the object selector.
If you implement OnInteractivePreviewGUI then this will only be called for non-interactive custom previews. The overidden method should use the rectangle passed in and render a preview of the asset into it. The default implementation is a no-op.
Note: Inspector previews are limited to the primary editor of persistent objects (assets), e.g., GameObjectInspector, MaterialEditor, TextureInspector. This means that it is currently not possible for a component to have its own inspector preview.