How to make only a part of a model 2-sided.

Okay, I have absolutely no experience with modelling, so excuse me if this is a stupid question, but I couldn't find anything about it in the tutorials.

For this model, I need to make the material on the tail two-sided. However, I do not want to make the rest of the model 2-sided because it'll look weird with the transparency.

How can I make only the tail two-sided? I guess I have to make the tail another geoset from the rest of the model but I have no idea how to do that..

Thank you.
Level 47
Dec 8, 2008
if you can get mdlvis: start mdlvis. than open your model. go to vertex editor(f1) and select all vertices you want to have as a separte geoset by the selecting tool. if you have all your vertices selected click on the green, splitted ball, the 'detach as new geoset' tool. and your'e ready. make the rest than in magos
Level 48
Apr 18, 2008
Actually, it's really simple. Open Notepad, open the MDL of your model, copy the whole thing that starts at "Geoset {" and ends with a "}" in the most left part(the whole geoset), then make a new line(Enter key) after the "}" of the geoset and paste the whole thing again. Save as a new file, and test it in Vertex Modify. There should be two geosets. Now just remove everything that is NOT a tail from one geoset, and visa versa from the other geoset. To attach a material to a geoset in Magos, open the model, create a new material with the desired options and go to the geosets panel. CTRL+Click the desired geoset in the 3D model viewer(the main window of Magos). The geoset will be highlighted in black, and the geoset in geoset manager will be highlighted in blue. Double click the highlighted(blue) geoset, and set it's material to your newly created one.

It's actually not as hard as I may have made it sound. It's really simple, takes two minutes.