Combining multiple caught souls into a single larger soul gem, using the alchemy window.
An empty soul gem would act as the apparatus to open the window, appearing on the top row, and disabling the 3 other windows.
Instead of an effects list the display shows the (max) capacity of each filled gem that is to be used.*
4 lower windows open the misc items window, to be selected with filled soul gems
- display for soul-less items would show "incompatible"
- attempted combination with an "incompatible" item does not work (activate) / gives a message
New soul gem is entitled "Mixed" with the added values of the (up to) 4 other gems.
There are a few things where I do not know if they are possible, such as copying and editing how the alchemy window works. Activating 4 gems simultaneously, or in succession. (ie, can the regular function of filled soul gems be used, or is a separate system of adding then implanting needed?).
And a simple yes or no on some of these points will be fine.
Thanks for reading.