Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the skull_bone_generator zip.

Usage

1. Open the Skull tab in the 3D viewport sidebar (N). With nothing selected, click the picture to choose one of the 95 designs, or browse the seven families, and add it at the 3D cursor. You can also use Shift+A, Mesh, Skulls & Bones.
2. The card at the top shows the design, its size and its face count. Surprise makes a new random design, Vary changes the current one a little, the palette button picks a random finish and the arrow resets the design.
3. The icon tabs hold every setting: Shape (kind, skull proportions, species, horns and antlers, skeleton body and pose, bone, pile layout), Jaw & Wear (jaw, teeth, chips, holes, cracks), Finish (bone condition, dirt, moss, colors) and Output (detail, seed, tilt, crossbones, Convert to Mesh, Delete).
4. Picture choices open a gallery: click the picture to see every option, or step through them with the arrows.

Lower the Detail for big piles and crowds of skeletons. Convert to Mesh makes a plain copy for editing or export.