A previous optimization prevented instances being added to the interpolation lists when hidden to save processing. This caused a regression when unhiding nodes outside of the physics tick - the interpolated transforms would be stale until the next physics tick, causing a glitch.
This PR readds instances immediately to the interpolation lists when they are unhidden, preventing this glitch.
In order to prevent glitches when unhiding nodes, set_transform() is still called to the VisualServer even for hidden nodes when the node is interpolated. This activates a lot of logic which is not necessary just to keep the previous transform updated.
This PR adds an early out which misses out on the unnecessary logic when instances are invisible.
- lawnjelly
ec9a17cfad
