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

All Influence e.g. color, but also normal and displacement maps.
All 阴影 calculation.
Subsurface Scattering
All 次表面散射.
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.