Dear Maintainer,

The recent version of gwyddion package is not able to render 3D image due to
the lack of OpenGL support during the build. Please enable this function.
Thank you.

Best regards,

Harvey.

hi harvey,

Thank you for your report, the build configuration does include
--with-gl, but GL support does not make it to the resulting
build due to GtkGlExt support missing in the build environment,
per configuration summary[1]:

	[…]
	=================================================================
	Configuration Summary:
	  OpenGL 3D widgets:               no (needs GtkGLExt)
	[…]

[1] : https://buildd.debian.org/status/fetch.php?pkg=gwyddion&arch=amd64&ver=2.67-1%2Bb1&stamp=1755173189&raw=0

I'm afraid enabling OpenGL support is going to require bringing
back libgtkglext1-dev, which dropped from Debian somewhen
between bookworm and trixie.  I see what I can do for unstable.
Maybe something is achievable by moving to gwyddion 3, thanks to
the bump to gtk3 upstream; that would also resolve #967514 about
upcoming drop of gtk2 from Debian, bug which has become release
critical recently.  Upstream still dubs gwyddion 3 as unstable
though.

Let's see how far I can get…

Étienne Mollier, on 2026-01-16:

As far as I can see, the 3D rendering capability is not
implemented in gwyddion 3, at least not for now.  The package
has dropped off Debian testing due to #967514, so it will be
necessary to bump to gwyddion 3 in unstable soon anyway.

Hopefully this will work well enough for common uses,

Dear Étienne Mollier,

Thank you for your explanation and contributions to this software.

Sincerely yours,

Harvey.