I want to experiment with the average of two typefaces – so for example interpolating/combining typeface A and B to a generated C. An example would be http://iotic.com/averia/ but in my case with far fewer shapes. Actually two would do.
Is there a way to try this with Glyphs? For example by “abusing” multiple masters?
If you only need to do it for a few glyphs, you can put the second shape in the background and use the Transform Filter > Background. You still need to make the paths compatible.