# Grey V4 resin- hollowing our Dental models

**URL:** <https://forum.formlabs.com/t/grey-v4-resin-hollowing-our-dental-models/26839>\
**Category:** General Discussion\
**Created:** [March 2, 2020, 7:48pm UTC](https://forum.formlabs.com/t/grey-v4-resin-hollowing-our-dental-models/26839 "2020-03-02T19:48:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mallowtru](https://avatars.discourse-cdn.com/v4/letter/m/ed655f/32.png) [@Mallowtru](https://forum.formlabs.com/u/Mallowtru)\
**Post date:** [March 2, 2020, 7:48pm UTC](https://forum.formlabs.com/t/grey-v4-resin-hollowing-our-dental-models/26839/1 "2020-03-02T19:48:13Z")

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Can anyone tell me how to make sure that all of the Quadrant and Full Arch models we print using GreyV4 resin will be Hollowed out without using another App besides 3Shape’s Model Builder App? It just seems to be random and I feel like I’m wasting all kinds of material. Is there some kind of settings I can change in the model builder App? Any Help would be great!