Created using Blender Geometry nodes and rendered in Cycles. I modelled the skull in zBrush, created a low poly version in blender, textured in substance and then created the node system below in Blender using Geometry Nodes. The user has access to a number of controls varying from controlling the overall size of the skull pile or each layer size, to the orientation of the skulls(upright facing-randomly oriented).

The full list of controls:

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-Seed

-Skull Amount

-Skull rotation

-Random skull roation deviations

-Overall size(XYZ)

-Individual layer size(up to 8 layers, set scale to 0 to disable layer)

-Individual layer height (for fine tune adjustment)

-Spear amount

-Spear seed

-Double skull pile height checkbox