Visleaf

A sample scene with two rooms.

The default visleaf structure for the above scene. Note how leaf 2 cannot see leaf 3.

A visleaf, or a leaf, is a type of volume in a map created by the visibility compile tools. When any part of a leaf is visible from any part of the current leaf, the entire contents of that leaf are considered for rendering.

The console variable "mat_leafvis 1" draws a red wireframe box around the Player's current visleaf, which is redrawn each time a new leaf is entered.

Leaves can also be examined from the desktop with the glview tool.

See also

• PVS (Potentially Visible Set) is a localised 'cluster' of visleafs used as a filter in visibility tests.
• PAS (Potentially Audible Set)
• VVIS compiler.
• Visleaf optimisation: Hint brushes
• Visleaves calculation: Optimization (Geometry)#Visibility
• Controlling Geometry Visibility and Compile Times
• Ralph van Hoorn's excellent explanation of visleafs.