Create/modify Shells thickness
I'm testing fracturing an object with a Shell modifier applied before.
In thin parts the shell modifier needs to be very thin in order not to destroy the shape.

In big parts it actually needs much more thickness.

(With "relative to surface area" I did not have luck)

When I assign an own MatID to inner faces and displace them, then only very small values keep the mesh shape intact.

Is there any known workflow or any idea, how to make only the bigger shells thicker?

What was wrong with "relative to surface area"?

You can use a Display Data operator to see the surface area of your particles. Perhaps you were not giving it the right threshold value.

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