Hollowing out models before slicing them.

[murphykieran@gmail.com]

I'm new to this 3d printing game, so I'm possibly doing something stupid or very wrong.  I understand that you can hollow out your models using the CHITUBOX software to save on resin and make printing much cheaper.  However, when I do that, and then slice the model, it's showing me a solid model and telling me it's going to cost about €10 in resin to print it.  Is there something I need to do after hollowing out the model before slicing it and exporting it so I can print the hollow model and not use so much resin?  Thanks in advance.

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OKay, I tried a different STL model I downloaded which hollowed out fine, but I still can't print it, I'll start a new thread.