3D Extrude does not scale

Maybe group the objects first. In the worst case convert to vectors (if possible/3D classic generates mostly vectors)

this still isnt fixed very anoying depth doesnt scale with the object have to manully change the depth after sclaling this maybe be fine if you have one or to object but have have loads.

Looks like an oversight with the new 3D & Materials effect to me. 'Scale Strokes and Effects' in the transform panel should affect it (and works correctly with the 'Classic' 3D effect), but does nothing in this case.

Staff are collating feedback to the new effect here:

https://illustrator.uservoice.com/forums/938463/suggestions/44254299

Some people have already noted that 'Scale Strokes & Effects' doesn't work, but it wouldn't hurt to have another voice if you care to leave a comment.

Hello, when you transform the object the extrusion depth remains independent. You can apply the depth you are happy with and expand the object. You will lose the ability to change the 3d properties after that tho.