# 3D beginner Problem

**URL:** https://community.freefem.org/t/3d-beginner-problem/3623
**Category:** General Discussion
**Created:** [December 9, 2024, 8:30am UTC](https://community.freefem.org/t/3d-beginner-problem/3623 "2024-12-09T08:30:48Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Ravi](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/ravi/32/2468_2.png) [@Ravi](https://community.freefem.org/u/Ravi)
#### Post date: [December 9, 2024, 8:30am UTC](https://community.freefem.org/t/3d-beginner-problem/3623/1 "2024-12-09T08:30:48Z")

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![Screenshot (11)](https://canada1.discourse-cdn.com/flex030/uploads/freefem/original/2X/4/43ca216dca2a9fbacbd4bde500cf739361ce7003.png)  
I don’t understand what I have done wrong here. It will be very helpful if someone clarifies why this cube is showing in red color.

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### Author: ![alh](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/alh/32/2354_2.png) [@alh](https://community.freefem.org/u/alh)
#### Post date: [December 9, 2024, 8:56am UTC](https://community.freefem.org/t/3d-beginner-problem/3623/2 "2024-12-09T08:56:32Z")

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Hi Ravi,

You have done nothing wrong. I will fix that asap. Thank you for the report.

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### Author: ![Ravi](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/ravi/32/2468_2.png) [@Ravi](https://community.freefem.org/u/Ravi)
#### Post date: [December 9, 2024, 12:27pm UTC](https://community.freefem.org/t/3d-beginner-problem/3623/3 "2024-12-09T12:27:46Z")

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Is the problem related to what version of FreeFEM I am using?

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### Author: ![alh](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/alh/32/2354_2.png) [@alh](https://community.freefem.org/u/alh)
#### Post date: [December 9, 2024, 3:49pm UTC](https://community.freefem.org/t/3d-beginner-problem/3623/4 "2024-12-09T15:49:13Z")

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No, it’s ok, the bug is now fixed in ffcs 24.5

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### Author: ![Ravi](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/ravi/32/2468_2.png) [@Ravi](https://community.freefem.org/u/Ravi)
#### Post date: [December 10, 2024, 12:30pm UTC](https://community.freefem.org/t/3d-beginner-problem/3623/5 "2024-12-10T12:30:22Z")

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Sir, can you also tell me what is the alternative of lenEdge for 3D case?