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MilkShape Plugin : Cat's Sims Mesh Mirror

by CatOfEvilGenius Posted 22nd Jan 2012 at 9:25 AM - Updated 27th Nov 2013 at 3:49 PM by Nysha
26 Comments / replies (Who?) - 13 Feedback Posts, 11 Thanks Posts
Cat's Sims Mesh Mirror

This MilkShape plugin makes a whole body clothing mesh from a half mesh, or a two shoe mesh from a one shoe mesh.

- mirror about X=0
- correct normals
- correct bone weights (left and right)
- correct front / back faces
- does NOT alter UV (use UV Flip)


Download, unzip, and put the file(s) in your MilkShape folder.
Look in the MilkShape Vertex menu for Cat's Sims Mesh Mirror.


1) Create a mesh for the right side only (or left side only), such as half a body mesh or one shoe. Make sure the normals and bone weights are set as you wish.

2) In the Groups tab, select the 1/2 mesh group and duplicate it with CTRL-D. (The duplicate is now selected.)

3) In the Vertex menu, select Cat's Sims Mirror Mesh. You now have two mesh groups, a left side and a right side.

4) Right now, the two mesh groups have identical UV maps. They use the exact same parts of the texture. This may be what you want for shoes, but maybe not for clothing. If not, adjust the UV map now. You can use the UV Flip plugins for this.

5) Now you can merge the left and right side mesh groups into one mesh group with Regroup. Don't forget to update the group name and comment.


Huge thanks to wes_h for the original MilkShape Unimesh plugins, and for helping me learn how to make plugins. Thanks to the makers of MilkShape.


Operating System:
      Windows: Windows XP, Windows Vista, Windows 7, etc
Utility Type:
      Meshing Tools: Tools and utilities helpful to meshers.
Plugin Type:
      Milkshape: Plugins for Milkshape 3D

You must have the expansion or stuff packs listed below installed to use this custom content. Please see the post text for any exceptions.

Key: - File was updated after upload was posted
Filename - Tip: You can click the magnifying glass to see the archive contents Size Downloads Date

Size: 8.3 KB · Downloads: 2,680 · 22nd Jan 2012
8.3 KB 2,680 22nd Jan 2012
Don't forget to Thank the creator after downloading! Use the Thanks button located above the screenshots above.
Basic Download and Install Instructions:

1. Download: Click the download link to save the .rar or .zip file(s) to your computer.

2. Extract the zip, rar, or 7z file.

3. Place in Downloads Folder: Cut and paste the .package file(s) into your Downloads folder:
  • Origin (Ultimate Collection): Users\(Current User Account)\Documents\EA Games\The Sims™ 2 Ultimate Collection\Downloads\
  • Non-Origin, Windows Vista/7/8/10: Users\(Current User Account)\Documents\EA Games\The Sims 2\Downloads\
  • Non-Origin, Windows XP: Documents and Settings\(Current User Account)\My Documents\EA Games\The Sims 2\Downloads\
  • Mac: Users\(Current User Account)\Documents\EA Games\The Sims 2\Downloads
  • Mac x64: /Library/Containers/com.aspyr.sims2.appstore/Data/Library/Application Support/Aspyr/The Sims 2/Downloads
Need more information?
26 Comments / Replies (Who?) - 12 Feedback Posts, 12 Thanks Posts
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Field Researcher
#2 Old 6th Jun 2010 at 12:35 AM
Perfect, Great work.

It's alright to make mistakes you're only human. Inside everybody's hiding something. Take time to catch your breath and choose your moment. Don't slide.
Not actually evil.
Original Poster
#3 Old 10th Jun 2010 at 7:05 AM
UPDATE June 10, 2010 fixed UV bug, please redownload!
Yes, I forgot to test the UV. I do feel rather idiotic about that.
Sorry for the inconvenience.

Please spay or neuter your pets. --- Cat Music Video! --- my meshes
Lab Assistant
#4 Old 10th Jun 2010 at 10:30 AM
Awesome. Pure Awesome! any chance at making a plugin that will mirror just the bones, like highlight a vert then make it from: 50% Lclav; 50% spine2; (hit a button and boom) 50% Rclav; 50% spine2?

Simmed out and lazy,

Not actually evil.
Original Poster
#5 Old 10th Jun 2010 at 5:13 PM Last edited by CatOfEvilGenius : 10th Jun 2010 at 6:13 PM.
Ken Something like that could be written, certainly, just take my mirror code and chop out everything but bone mirroring. I'm not sure of the purpose though. What would you use it for?

Please spay or neuter your pets. --- Cat Music Video! --- my meshes
Lab Assistant
#6 Old 11th Jun 2010 at 4:02 AM
say previous projects that are non-symmetrical that i gave up on. for my style of meshing it could be very useful. just wishfull thinking. the uv flip and this plugin are a freakin dream come true though. thanks and yes i do have the newer version.

Simmed out and lazy,

Not actually evil.
Original Poster
#7 Old 11th Jun 2010 at 4:12 AM Last edited by CatOfEvilGenius : 11th Jun 2010 at 7:19 PM.
Ken I'll upload a bone only mirror for you later, probably tomorrow.


Here you go, this only mirrors bones. Does NOT change vertices, normals, UV, front/back facing, nor anything else. You'll need to do that yourself if you use the "bone only" mirror.
Download - please read all instructions before downloading any files!
File Type: 7z msCatsSimsBoneMirror.7z (7.7 KB, 60 downloads)

Please spay or neuter your pets. --- Cat Music Video! --- my meshes
#8 Old 28th Jun 2010 at 9:04 PM
I don't know much about this, because I don't mesh clothes, but it looks so cool! And like you've put a lot of work and thought into it. So congratulations!
Gone Fishin'
retired moderator
#9 Old 30th Jun 2010 at 3:06 PM Last edited by nixnivis : 30th Jun 2010 at 3:53 PM.
*does happy dance* Just what I needed for making shoes; manually changing all the "left" bones to "right" bores me to distraction even on a good day. Thank you!!
Lab Assistant
#10 Old 11th Dec 2010 at 10:10 PM

Now i can freakin finish fastttttttttttt XD <3
Forum Resident
#11 Old 3rd May 2011 at 2:37 PM
Thanks a lot Cat. I really need this stuff as, my sims look very unsymetric. Keep up the good work.
The Pathfinder
retired moderator THANKS POST
#12 Old 22nd Jan 2012 at 9:54 AM
Great idea
Lab Assistant
#13 Old 24th Jan 2012 at 6:32 PM
OMG, this sounds so cool! I personally don't think that I'd make half meshes to flip and make a full body, but it'd be really useful for shoes *-*

Thanks a lot!
#14 Old 11th Feb 2012 at 9:54 PM
I can't honestly say that I have a use for these right now but it's so nice to see these and know they're available if I ever get into bodyshop meshing. Thank you!
Test Subject
5th Apr 2012 at 4:42 AM
This message has been deleted by rawmilk905.
Forum Resident
#15 Old 18th May 2012 at 5:27 AM
Great jobb cat. I always thought you were a genius. Thanks you very much for sharing. keep up the good work.
#16 Old 26th Sep 2012 at 4:55 PM
I just tried this out today for the first time with wondrous results! It's so nifty for if you have assigned joints perfectly on one hemisphere, but they are wonkydyliic on the other.
Test Subject
#17 Old 25th Jun 2013 at 4:13 PM
I have been using this tool so much lately! I want to thank you a million times over for the making this tool! It makes meshing so much quicker, easier & PERFECT! Thank you xoxo
Field Researcher
#18 Old 19th Oct 2013 at 10:38 AM
Yep, this is going in my backup files. Thank you very much!
Mad Poster
#19 Old 13th Mar 2014 at 1:43 PM
OMG! I should have come in here sooner!!! This is a dream..
And the bone only mirror..woah. Thank you so much for this.

Je mange des girafes et je parle aussi français !...surtout :0)

Find all my old MTS Uploads, on my SFS, And all new uploads Here . :)
Test Subject
#20 Old 5th Jul 2014 at 8:35 PM
Thank you ! :)
Mad Poster
#21 Old 20th Feb 2015 at 2:28 PM Last edited by murfee : 20th Feb 2015 at 3:13 PM.
Omg this looks fantastic!

[EDIT] No, this doesn't look fantastic at all -- it IS fantastic! This is just what I needed; one simple click and all my problems were solved; thank you thank you!
Test Subject
#22 Old 11th May 2015 at 4:46 PM
Lab Assistant
#23 Old 9th Aug 2015 at 2:50 PM
I wish I saw it sooner.
Thank you so, so much!
Forum Resident
#24 Old 29th Nov 2016 at 9:38 PM
I tried this tool and it is great. I had a hell trying to convert a maxis hoodie to HBB with all the shadows and folds on the arm so I finally settled for having same UV for both arms and this tool was great. Thank you very much Cat, you're such a genious.
#25 Old 26th Aug 2019 at 7:21 AM
Another lifesaver! Thank you so much. Can't imagine meshing without this now.
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