Globally de/activates engine features in Render ‣ Shading panel…

All Influence e.g. color, but also normal and displacement maps.
All Shadows calculation.
Subsurface Scattering
All Subsurface Scattering.
Environment Map
The world texture.
Ray Tracing
The shadow tracing.

Switches between a world background to be the sky or transparent.

Sky, Transparency

World Space Shading
Shading can optionally be computed in world space rather than camera space. This affects e.g. normal and lamp vectors. This is often more convenient and matches other engines behavior.