Overgrowth FAQ
From Wolfire Games Wiki
Overgrowth is running slow on my computer
The Overgrowth alpha is currently set to use the maximum graphics settings, even if this is grossly inappropriate for your computer. There is not currently any UI available to change this, so you will need to edit the config.txt file. On Windows, this is located in the Data directory, which is found in the same directory as the Overgrowth executable. On Mac, you will need to right click the Overgrowth application and choose show package contents. It is then located in the Data folder found in the Contents/Mac OS folder.
Change the following values to these new ones:
screenwidth: 800 screenheight: 600 multisample: 4 anisotropy: 4 texture_reduce: 1
If it's still running slow, try this:
screenwidth: 640 screenheight: 480 multisample: 0 anisotropy: 0 texture_reduce: 2
