I am no expert, but I don't think that error has anything to do with SH3D.

gustlgans: which graphics card do you have? can you try using different drivers? It may be related to that.

Great trick!

This JMF library, is that something that must be packaged with the application, or could it be installed separately, either manually or in a separate -nonfree package?

On a separate note, I have requested the GetDeb packagers to include the library in their build: https://bugs.launchpad.net/getdeb ...

A transparent box will create holes in walls; good.

However, for some reason, it does not create holes in the ceiling (at least not box_invisible.zip).

-Dcom.eteks.sweethome3d.resolutionScale=2.5
-Dswing.defaultlaf=javax.swing.plaf.metal.MetalLookAndFeel
-Dswing.plaf.metal.controlFont=Dialog-11
-Dswing.plaf.metal.userFont=SansSerif-11
-Dswing.plaf.metal.systemFont=SansSerif-11

That works beautifully! I had set -Dcom.eteks.sweethome3d ...

First of all, thanks for developing this fantastic piece of software. It is not only very cool, but also really useful.

I am using the "Create photos at points of view" option. However, this option misses some options that the "Create photo" menu has. In particular:
Switch for enabling ceiling ...

For increasing the max memory, as well as HiDPI adjustments (http://www.sweethome3d.com/support/forum/viewthread_thread,5384_offset,10), Linux users are asked to modify the startup script, which is understandable.

However, this script is part of the installed files, which should not be modified ...

For Debian/Ubuntu, you can use the version from http://www.getdeb.net/ as well.