# can't paint certain pictures in a volume-microCT
**URL:** https://discourse.slicer.org/t/cant-paint-certain-pictures-in-a-volume-microct/22945
**Category:** Support
**Tags:** segmentation
**Created:** [April 13, 2022, 5:55pm UTC](https://discourse.slicer.org/t/cant-paint-certain-pictures-in-a-volume-microct/22945 "2022-04-13T17:55:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Curiouslearner](https://discourse.slicer.org/u/Curiouslearner)
#### Post date: [April 13, 2022, 5:55pm UTC](https://discourse.slicer.org/t/cant-paint-certain-pictures-in-a-volume-microct/22945/1 "2022-04-13T17:55:29Z")
For some reason, I could not paint certain pictures (early scans of the series) of a volume. I could not even paint on the most bright area regardless of the threshold settings. Has anyone encountered similar problem and how you solve it? Thank you so much in advance!
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### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [April 13, 2022, 6:41pm UTC](https://discourse.slicer.org/t/cant-paint-certain-pictures-in-a-volume-microct/22945/2 "2022-04-13T18:41:35Z")
Check out [these FAQs](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#cannot-paint-outside-some-boundaries) and let us know if it solved your problem.
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### Author:  [@Curiouslearner](https://discourse.slicer.org/u/Curiouslearner)
#### Post date: [April 13, 2022, 6:47pm UTC](https://discourse.slicer.org/t/cant-paint-certain-pictures-in-a-volume-microct/22945/3 "2022-04-13T18:47:09Z")
I can paint again after playing geometry of the master volume. I changed the oversampling factor to some a number and then changed it back to 1. it made the difference!! Thank you so much!!