Default NPC images to a class/role image

[periwinkle15]

Very low priority, but I think it'd be cool to have the image data for NPCs auto-populate to the token for their class role, or a similar simple token, instead of to the no-image "image." I have no need to upload custom images for every single one of the dozens and dozens of NPCs I create and only use once, but I don't enjoy staring at the "no image data" notice while using active mode.

[jarena3]

I don't know if I could get default art for NPCs, but maybe hide the no-image placeholder if there's nothing to show?

massif-press/compcon#3250

[jarena3]

resolved in prod