From the AVsitter website
Second Life has now enabled ‘experiences’ which will allow automatic attachments (without need for any permission request).
To get the benefit of automatic attachments with AVprop:
- Users will need to enable the experience ‘AVsitter’ (by Code Violet) on their land. An experience may be enabled at the estate level or the parcel level by adding it to the Allowed list for the estate or parcel. Experiences are enabled under ‘About Land’ in the SL viewer. For an excellent explanation, see this video by Froukje Hoorenbeek.