Lower resolution shadow maps?
I was looking at the config file, and hadn't seen this mentioned before. So don't shoot if this is old news!
But changing this value under the [core] subheading
ShadowMapSize=5
To 3, so it reads
ShadowMapSize=3
I end up getting a noticeable boost in fps, and some quick bench marking seems to confirm it.
IT also makes sense that changing this improves performance, as this controls the resolution of the maps used to generate the shadows in game.
THE DOWNSIDE
Shadows in the cockpit and ground are blotchier/lower resolution. Tress, and in particular the shadows under them shimmer more.
Using a value of 4 instead of 3 should alleviate some of these issues, but with a lower benefit in performance. Similarly a value of 2 or 1 should have worst artifacting, but better speed.
I don't have time to do full bench marking now, but I'd like to see some other people confirm this.
|