<?xml version="1.0" encoding="ISO-8859-1"?>
-<screensaver name="hilbert" _label="Hilbert">
+<screensaver name="hilbert" _label="Hilbert" gl="yes">
<command arg="-root"/>
The Hilbert path is a single contiguous line that can fill a volume
without crossing itself. As a data structure, Hilbert paths are
useful because ordering along the curve preserves locality: points
-that close together along the curve are also close together in space.
+that are close together along the curve are also close together in space.
The converse is often, but not always, true. The coloration
reflects this.