AA improves edit grid performance on large maps

[acerspyro]

Tested on my version of ghost, called ghost-esport (ask me if you want to test the issue).

I am running Ubuntu 16.10 with the Gnome desktop.

Steps to reproduce:
- Look at the map from the sky in Edit mode with AA set to -1
- Enable the edit grid using the EQUAL key (by default)
- Embrace the low framerate
- Turn on AA
- See the framerate improve

Could it be that the way to render the edit grid is different depending on whether or not AA is enabled?

[qreeves]

No idea, but the engine doesn't seem to touch the GL_MULTISAMPLE attributes at all if "fsaa" is set to "-1", so I'm guessing in that instance it is using the driver defaults. The better test would be "0" compared to "1".

[acerspyro]

By the way, I saw my FPS shoot up from 20 to 190.

Tested with AA set to 0, no change.

[qreeves]

OK then, I have no idea though :P