Preview toggle
/sbrs preview enable will now toggle the preview when used without an argument. Thanks to ARR4NN for the contribution.

Improved rendering metrics
The preview has now much more detailed metrics in the debugging log.

Restart Rendering
when experiencing issues with the rendering you can now reload it directly via /sbra restartRendering. This requires the schematicbrush.admin.restartrendering permission. /sbra reload will also restart the rendering now. Once it is restarted preview subscriptions will be invalid and need to be renewed again.

Increase rendering stability
A bug was fixed which caused the preview to break when someone subscribed a preview while not being in the same world as the subscribed player

Notification on large schematics
While holding a brush with a schematic which exceeds the render size a message is displayed in the action bar. This will hopefully make this limit more recognisable.

Made preview smoother
Servers running on a 1 tick preview refresh will experience a much smoother preview now. I switched the packet worker from an async bukkit runnable to an own dedicated thread. Bukkit caused a 1 tick delay, making a 1 tick preview request and effective 2 tick preview refresh. You get double the updates now \o/