While we're off-topic, I just wanted to mention that regardless of realism, the effect could use some work before being considered ready for inclusion as a default. My complaints:
1. The effect distorts geometry in front of it. Given that said geometry is necessarily silhouetted by the brilliant white of the thruster, this is too visible to ignore.
2. The effect makes the 2d nature the the thrusters too obvious. Maybe this would be less of a problem if you tweaked the thruster animations so the distorted Bitmap 2 didn't end up too far outside the visible radius of Bitmap 1, but even then there's the problem where half of Bitmap 1 is distorted and half isn't.
3. The effect does not distort the nebula. Maybe this is too much to ask, but it's just sort of odd that the ship's hull seems to be bucking and twisting just aft of the thruster, while the wispy puffs of pink gas sail by unaffected.
Back on topic though, is there something we should be doing to help bugtest the normal launcher and figure out why 3.6.13 makes it crash? I mean, I guess I could go through all the nightlies since 3.6.12 came out, but I can't help but wonder if there's something more constructive I could be doing.