Editing Shadow volume (section)

=== Exclusive-or ===
Either of the above types may be approximated with an [[Exclusive disjunction|exclusive-or]] variation, which does not deal properly with intersecting shadow volumes, but saves one rendering pass (if not fill time), and only requires a 1-bit stencil buffer. The following steps are for the depth pass version:

# Disable writes to the depth and color buffers.
# Set the stencil operation to XOR on depth pass (flip on any shadow surface).
# Render the shadow volumes.