# Help dev)"curved planar reformat" color problem

**URL:** https://discourse.slicer.org/t/help-dev-curved-planar-reformat-color-problem/37554
**Category:** Development
**Tags:** segmentation, extensions-manager, python
**Created:** [July 25, 2024, 8:04am UTC](https://discourse.slicer.org/t/help-dev-curved-planar-reformat-color-problem/37554 "2024-07-25T08:04:41Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Seokjun\_Hwang](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/seokjun_hwang/32/76745_2.png) [@Seokjun\_Hwang](https://discourse.slicer.org/u/Seokjun_Hwang)
#### Post date: [July 25, 2024, 8:04am UTC](https://discourse.slicer.org/t/help-dev-curved-planar-reformat-color-problem/37554/1 "2024-07-25T08:04:41Z")

</div>

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/a/1a032856b290199edb0774082c2c27588375025a.png)

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/7/2797d01ea272bbbc6dd58b1a14f1061a4039a7d2.png)

Hellow…!

I am seeking assistance with an issue encountered while using the Curved Planar Reformat module with sandbox extensions.

**Problem:** I used the straightening function to straighten the aorta into a straight line. However, the overall color of the volume and the cross-section are not filled uniformly with one color (white); instead, they alternate with black. This is causing issues with mask preprocessing when transferring and saving the data in Python.

**Implementation Steps:**

1. First, I loaded the aorta 3D data in nii.gz format as two node types: volume and segmentation.
2. Using the curve line, I applied the straightening mode and created a new straightened volume.
3. Upon checking, I noticed the color issue as described.

I cannot use any edits. Additionally, there is an issue with displaying it in the 3D viewer.

How can I change the color to white? Or how can I resolve this issue?

Thank you.