Guys I need help, my plugin work on 5.4 and I done project on 5.5… I was just not thinking about it when I started, is there way to migrate assets, its nothing complicated? Any solution to this?
As far I know there is no way to downgrade a project if this is based on Blueprints. But why not just upgrading your plugin to 5.5 ?
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Welp! https://developer.picoxr.com/document/updates-unreal/
I found app on marketplace “asset downgrader” maybe that can help?
This is yet another problem in UE, simple thing they complicate. In 3ds max you have option to save in witch version you want (last 3) and then default 3ds format, I get it its 3d model and more simple, but they could make it at least one step downgrade its in ue5 engine, I don’t look ue4. Epic have these small problems that makes you mad on Engine that in reality is great.
Hey there @Kratos_again! Unreal Engine doesn’t have a solid method for downgrading a project. The asset downgrader community utility can help when it comes to specific assets and types, but it won’t work for full project situations. It’s usually recommended to keep a backup copy (And when you upgrade to a new version it usually asks you to do it as a copy) when you upgrade a project.
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I know for upgrade, I will also hold copy if I try downgrade.
If possible, try to check your project into source control often to make sure you always have a restore point for the future before making anymore large moves. Let me know if the Asset Downgrader utility works for your use case. It’s also possible to do manually, but results may vary. If your project is far along it might be best to see if the plugin is able to be ported.
Older method of manually modifying asset versions:
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there is no way to downgrade a project
This is the real answer. Any other attempt is unlikely to be all that satisfying.
The two questions I have are:
- How hard would it be to upgrade your plugin to 5.5, really? The change shouldn’t be that bad.
- How much work is there in the game, separate from the assets (meshes, textures, sounds)?
What if you just re-built the things you’ve built in 5.4? You can keep 5.5 and 5.4 open at the same time and just re-build each of your assets, unless there’s tens of thousands of them. It’ll probably just take a few hours, because you know exactly what to do. (Yes, it’s tedious, but it’s also guaranteed to work, and a one-time cost!)
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I spent some 14 hours to prepare model again unwrap whole interior scene and now I will try in 5.3.2. I can easily update. I tried Asset Downgrader but it crash 5.5.3 I accidentally update from 5.5.0 to 5.5.3, and that is the point of no back… my only concern are blueprints are they gonna work (I will copy them ), but model is already in 5.5.3. Also thanks for that downgrade option but when I see code I run 
What do you think its best version to use?
You can export meshes to FBX and then re-import them, you shouldn’t have to re-do any of that work.
Also, un-wrapping in Unreal? That’s an exciting approach 
If it works for you, great!
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As Jwatte mentioned, you can export directly from the engine from it’s UAsset to an FBX format:
I would also recommend working in a 3rd party software like Blender into your 3D pipeline, as the modeling tools inside of the engine are nice, but they are mostly used for small modifications to existing models or for placeholder/grayboxing levels. They aren’t as robust as a program designed for 3D modeling, rigging, texturing, etc.
unwrap every single model in 3ds max Ue dose sloppy job on seeams.
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