Working demo: http://test.form-stil.com/wp-content/themes/betonstapelblock/onlineKonfi/?t=1683373799 (click "Konfiguration starten" bottom left button).
Click, next next and in this view:
You can see four different sizes. Both four with and without nipples (ohne Noppen) below. Now needed only three sizes for both: with and without nipples:
150 cm x 60 cm x 60 cm 90 cm x 60 cm x 60 cm 60 cm x 60 cm x 60 cm
No access due to company policy to the website. Make changes, commit and then they will upload and test.
These are the fbx files (@kaspar: not sure why needed): https://www.dropbox.com/s/wkal5jzupsh1fsj/block_150x60x60.fbx.fbx?dl=0 https://www.dropbox.com/s/asnd0uwaura7ose/block_90x60x60.fbx.glb?dl=0 https://www.dropbox.com/s/48ysdgmmtjihn6o/block_1.afa7e744.fbx?dl=0