I've read that application.loadLeveAdditiveAsync is a pro only feature. I'm looking for an asset that can do something similar. I would like to load assets based on the camera/player position. Ideally, it would be great to dispense with scenes entirely and just load information based on some distance value. This asset seems to be doing just that: https://www.assetstore.unity3d.com/en/#!/content/8015 however I'm not sure if the author is active anymore, and recent customers are complaining about a serious bug.
Any recommendations about assets that allow for seamless, open world style transitions between scenes would be great. (using Unity 3D 5, basic version, and writing in c#).