You can either turn Projected Textures on or off. The tooltip reads, "enables the projecting of textures to the environment. Disabling this may greatly improve performance."
Don't disable it, though. As you can see below, I've cast Consecrate in both screen shots. In the first, you can't see the spell at all. In the second, you can. Without textures projected onto the environment, there's a fair chance you'll have trouble with Algalon, Lady Deathwhisper, Halion, and Sindragosa. Any fight where there is something on the ground that you need to avoid becomes significantly harder if you...well, can't see whatever it is you're supposed to be avoiding.
Oh no! Where's the consecrate?
Ah ha, there it is.
- Welcome To The World...Of Warcraft: Cataclysm
- Test Hardware And Setup
- AMD: High-End Cards At Ultra Quality
- AMD: Mainstream Cards At Good Quality
- Nvidia: High-End Cards At Ultra Quality
- Nvidia: Mainstream Cards At Good Quality
- DirectX 9 Versus DirectX 11
- AMD And Nvidia: Anti-Aliasing Performance
- CPU Scaling: Intel
- CPU Scaling: AMD
- Patch Notes: 4.0.1
- Detail Presets: Five Options From Which To Choose
- Textures: Texture Resolution
- Textures: Projected Textures
- Environment: View Distance
- Environment: Environment Detail
- Environment: Ground Clutter
- Effects: Shadow Quality
- Effects: Liquid Detail
- Effects: Sunshafts
- Effects: Particle Density
- Performance Conclusions