Invisible houses toggle with ctrl+click on the transparent trees widget http://wolf01.game-host.org/OTTD_relate ... 10002.diff <- don't try this at home, needs bugfixing for newhouses
Invisible trees toggle with ctrl+click on the transparent trees widget http://wolf01.game-host.org/OTTD_relate ... 10002.diff <- should work also if old
Transparency saving widget http://wolf01.game-host.org/OTTD_relate ... 11243.diff <- updated I NEED IT!

Synced some separate patches for the new features: invisible houses, save widget and toggle invisible trees/houses patches directly with CTRL+click on the widget
NEW! (is #FF4040, not RED, dalestan

Updated the Transparency Saving patch, now it saves to openttd.cfg, it doesn't break the savegame compatibility
to use it:
1) enable the saving using the widget, or CTRL+2
2) set the wanted transparencies
3) toggle them with X <- this trigger the backup routine which stores the transparencies to the variable
4) now with X you can toggle between full visible and saved transparencies
5) close the game, play or do what you want, remember that if you change the transparencies with the saving widget enabled, you must go back to point 3
now, you load a game, or you do a new game:
1) enable the saving using the widget, or CTRL+2
2) toggle the transparencies with X
3) play normally, if you want to change the saved transparencies please see the section above