0.90 - New edge highlight effect is (sometimes) extremely laggy

[Anquietas314]

As mentioned in the title, the new edge highlighting effect in 0.90 causes some lag; whenever I mouse over a part in the stack list, the game drops to under 1 fps for a few seconds while it renders the effect, then returns to normal. This happens both in the VAB and in flight, although it seems like mousing over the same part several times reduces the time it takes to draw the effect. A single 1.25m capsule with a basic SRB is enough to replicate the effect.

KSP version: 0.90 Windows 32 bit, steam version

output_log.txt

DxDiag.txt

Possibly relevant: I noticed in the output log that KSP thinks my graphics card uses shader model 3; it actually uses shader model 4, although it's one of the earliest cards that did so. Since shader model 4 added geometry shaders (at least in OpenGL), which are very useful for things like edge highlighting, my guess would be that KSP or unity is using some sort of CPU-based fallback and then caching it, hence the lag.

Obviously in the meantime I can just disable the effect and everything works fine, but it would be nice to enjoy the new effects like everyone else

EDIT: I decided to try -force-opengl, it seems to mostly resolve the problem. There's still a very slight frame jitter when mousing over the stage list, but it's no longer severe enough to warrant turning it off

Edited December 18, 2014 by armagheddonsgw
Found a partial workaround

[Archgeek]

Confirmed, the game derps for nearly two seconds on my older machine if dare to go near the staging interface. I'll have to check on that shader thing at home, though.