Kerveball

Nice! That addresses the problem and then some. I guess I was originally looking for a simple mechanic which would fit within the vanilla LiFu/Ox/RCS/Xe fuel options. Thanks for the timely advice.

Apologies if this is an old concept - I checked the "current ideas" post and didn't see it. I've been doing a bit with nuclear engine transfer stages, and it seems to me that if I have a fuel tank and have removed all of the lox from it for use with a nuclear engine, then I should either be able to reduce the weight/size of the tank because that storage is unused or I should be able to fill it with extra liquid fuel where the lox would normally be stored. Alternatively I would see extra rocket parts being available with pure fuel capacity rather than mixed lifu/lox capacity (apart from the aeroplane parts). I propose an interface option where fuel tanks normally have the two fill bars but can have a checkbox option to replace lox with extra fuel or vice versa. This would be of particular utility for space station tanks allocated as top-off for interplanetary craft. Thoughts?

Having the identical problem, however it will just occur after some time playing the game. Seems to be associated with switching to a craft from the tracking centre. I get a perfectly black screen with hud info like this http://i.imgur.com/qumXnCW.png and then when I return to the space center there is a picture like that of IraqiWalker above. A restart of the game usually provides a temporary fix. The only mods I am running are: Kerbal Engineer Redux, Kerbal Alarm Clock, and Navyfish's docking mod. Any advice appreciated.