blocktube - Man Page

draws a swirling, falling tunnel of reflective slabs


blocktube [--display host:display.screen] [--visual visual] [--window] [--root] [--window-id number] [--delay number] [--holdtime number] [--changetime number] [--no-texture] [--no-fog] [--wireframe] [--fps]


Blocktube draws a swirling, falling tunnel of reflective slabs. They fade  from hue to hue.


--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: 40000 (0.04 seconds.).

--holdtime number

How long to stay on the same color.  Default: 1000 frames.

--changetime number

How long it takes to fade to a new color.  Default: 200 frames.


Draw solid blocks intstead of reflective blocks.


Do not make blocks in the distance be darker.


Only draw outlines.


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)


Lars Damerow <>


6.08-2.fc40 (27-Jan-2024) X Version 11 XScreenSaver manual