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glblur - Man Page

3D radial blur texture fields


glblur [--display host:display.screen] [--visual visual] [--window] [--root] [--window-id number] [--delay number] [--blursize number] [--no-wander] [--no-spin] [--spin [XYZ]] [--fps]


This program draws a box and a few line segments, and generates a  radial blur outward from it.  This creates flowing field effects.

This is done by rendering the scene into a small texture, then repeatedly rendering increasingly-enlarged and increasingly-transparent versions of that texture onto the frame buffer.  As such, it's quite graphics intensive: don't bother trying to run this if you don't have hardware-accelerated texture support.  It will hurt your machine bad.


--visual visual

Specify which visual to use.  Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual.


Draw on a newly-created window.  This is the default.


Draw on the root window.

--window-id number

Draw on the specified window.

--delay number

Per-frame delay, in microseconds.  Default: 10000 (0.01 seconds.).

--blursize number

How many copies of the scene should be laid down to make the vapor trail. Default: 15.  Larger numbers create smoother fields, but are slower.

--wander | --no-wander

Whether the object should wander around the screen.

--spin [XYZ]

Around which axes should the object spin?




Display the current frame rate, CPU load, and polygon count.



to get the default host and display number.


to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.


The window ID to use with --root.

See Also

X(1), xscreensaver(1)


Jamie Zawinski, with inspiration from a tutorial by Dario Corno.


6.09-1.fc41 (11-Jun-2024) X Version 11 XScreenSaver manual