# Mixed volume rendering and surface representation of segmentation has incorrect 3D appearance if segment is not fully opaque

**URL:** <https://discourse.slicer.org/t/mixed-volume-rendering-and-surface-representation-of-segmentation-has-incorrect-3d-appearance-if-segment-is-not-fully-opaque/6532>\
**Category:** Support\
**Tags:** volume-rendering\
**Created:** [April 17, 2019, 8:18pm UTC](https://discourse.slicer.org/t/mixed-volume-rendering-and-surface-representation-of-segmentation-has-incorrect-3d-appearance-if-segment-is-not-fully-opaque/6532 "2019-04-17T20:18:03Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [April 17, 2019, 8:54pm UTC](https://discourse.slicer.org/t/mixed-volume-rendering-and-surface-representation-of-segmentation-has-incorrect-3d-appearance-if-segment-is-not-fully-opaque/6532/2 "2019-04-17T20:54:06Z")

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To render semi-transparent models correctly, you need to enable depth peeling.

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/6/0649f4eba08584f8999dda46f9f5e3f9dfecbeab.png)

You can enable depth peeling by default in menu: Edit / Application settings / Views / 3D viewer defaults / Use depth peeling - then restart Slicer.

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_[View the full topic](https://discourse.slicer.org/t/mixed-volume-rendering-and-surface-representation-of-segmentation-has-incorrect-3d-appearance-if-segment-is-not-fully-opaque/6532)._