I did a quick test. Indeed when the tree is transparent - the smearing is stopped, or drastically reduced. I used “TranslucentGreyTransmittance” - but maybe there’s a much better way to achieve 0.001 % transparency for an object.
You can also noticed the effect in the wireframe portions.
My computer is old and slow, so you should probably disregard the FPS displayed on the screen. Even though the video with the transparent tree has more FPS, compared to the opaque tree with the smearing.
The first one is the opaque
opaque.mkv (8.0 MB)
the transparent
transp.mkv (10.3 MB)
How do I embed video files ?