# MRtrix 3.0 (release candidate 2)

**URL:** <https://community.mrtrix.org/t/mrtrix-3-0-release-candidate-2/1065>\
**Category:** Announcements\
**Tags:** update, release\
**Created:** [July 31, 2017, 5:50am UTC](https://community.mrtrix.org/t/mrtrix-3-0-release-candidate-2/1065 "2017-07-31T05:50:46Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![maxpietsch](https://community.mrtrix.org/user_avatar/community.mrtrix.org/maxpietsch/32/25_2.png) [@maxpietsch](https://community.mrtrix.org/u/maxpietsch)\
**Post date:** [August 1, 2017, 10:47pm UTC](https://community.mrtrix.org/t/mrtrix-3-0-release-candidate-2/1065/7 "2017-08-01T22:47:54Z")

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### `population_template` voxel size handling

The voxel size of the template produced by `population_template` was previously automatically determined from the input images. However, this resulted in suboptimal outcomes under some circumstances, particularly when large rotations exist between the different input images. Furthermore, it became apparent that different voxel sizes were required in different scenarios. To deal with these issues, a new option has been added to `population_template` to allow the output voxel size to be set manually. We encourage users to set the desired voxel size of their template manually, as is now recommended in the [fixel-based analysis documentation](https://mrtrix.readthedocs.io/en/latest/fixel_based_analysis/st_fibre_density_cross-section.html).

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