# Material ID changing and/or creating **URL:** \ **Category:** Rendering\ **Tags:** fbx-import, reimport, unreal-engine, question\ **Created:** [October 29, 2018, 9:37pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664 "2018-10-29T21:37:04Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![CCimbaro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CCimbaro](https://forums.unrealengine.com/u/CCimbaro)\ **Post date:** [October 29, 2018, 9:37pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664/1 "2018-10-29T21:37:04Z")
Hi Epic team, I hope you’re well, currently we have some issues with reimport option for our FBX in Unreal 4.20.2. We our level artist reimport a mesh, sometimes the engine create new ID material or shuffle the order. We check on UDN and Unreal forum, our meshes are combine and we never have this issue before the 4.20. Here’s a quick video with idea material different between the material section and the LOD section. I know it’s normal it could be different, but the material section just merge 2 ID. Sometimes, it create a new one, and for example as you can see in the video we have currently 9 ID for only 5 on the mesh. We check on internet, we see that Unreal get this issue in the 4.14 and we check and their is no bug fix in 4.20.1/.2/.3. Is it something you allready know? It never happen with new mesh, only on reimport. Have a nice day and thanks for your support. ---
**Author:** ![CCimbaro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CCimbaro](https://forums.unrealengine.com/u/CCimbaro)\ **Post date:** [October 29, 2018, 9:37pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664/2 "2018-10-29T21:37:51Z")
Unfortunately, I can’t upload video because of 25MB… ---
**Author:** ![Jeff\_A](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Jeff\_A](https://forums.unrealengine.com/u/Jeff_A)\ **Post date:** [November 5, 2018, 2:52pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664/3 "2018-11-05T14:52:09Z")
Hello, We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue. [https://epicsupport.force.com/unrealengine/s/](https://epicsupport.force.com/unrealengine/s/) Thanks ---
**Author:** ![CCimbaro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CCimbaro](https://forums.unrealengine.com/u/CCimbaro)\ **Post date:** [November 9, 2018, 5:53pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664/4 "2018-11-09T17:53:14Z")
I see it : > **[The Unreal Engine Issues and Bug Tracker](https://issues.unrealengine.com/issue/UE-64028)** > > Welcome to the Unreal Engine Issue and Bug Tracker. You can check the status of an issue and search for existing bugs. See latest bug fixes too. it seems to be, related to our bug. Do you know if we can get the change list number to know exactly when the fixed was push? Have a nice day, ---
**Author:** ![CCimbaro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CCimbaro](https://forums.unrealengine.com/u/CCimbaro)\ **Post date:** [November 15, 2018, 5:59pm UTC](https://forums.unrealengine.com/t/material-id-changing-and-or-creating/436664/5 "2018-11-15T17:59:00Z")
I see it : [Unreal Engine Issues and Bug Tracker (UE-64028)](https://issues.unrealengine.com/issue/UE-64028) it seems to be, related to our bug. Do you know if we can get the change list number to know exactly when the fixed was push? Have a nice day,