Using the same image for large and small spell icons.
The way OpenMW finds and uses spell icons in the UI is tailored strictly to how Morrowind names and organizes its icons. The small icon is first assigned in OpenMW-CS to a magic effect. The large icon then needs to be another image with a b_
prefix in its name. This works for Morrowind, but not when icons are in subfolders or when wanting to use a single image for the small and large occurence in the UI.
Let's consider the following example:
The small icon is assigned in OpenMW-CS to the corresponding magic effect record and then shows in the UI.
The icon field takes the path magic/alteration/shield.dds
But to get the large icon to show (and not a pink missing texture) there needs to be another image file with a path b_magic/alteration/shield.dds
The proposal is to change this system when it doesn't find a large icon, to fallback to the one assigned through OpenMW-CS. Related code gitlab.com/OpenMW/openmw/-/blob/master/apps/openmw/mwgui/hud.cpp#L421