(Solved) Minor - UEFN | Modelling Tools - Baking creates artifacts (all textures)

General Issues and Bug Reporting
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1

EDIT: This issue is a result of the modeling containing unwanted geometry, not a problem on modeling tools.

So I imported a mesh from Blender that I made, which had no smoothing group information (not sure if that’s the reason) and tried to bake maps using the baking tool in UEFN, but every map had weird artifacts when being generated. Here are the settings, the mesh itself, the textures and logs:

UnrealEditorFortnite-Win64-Shipping_wSPeiaZjEf
UnrealEditorFortnite-Win64-Shipping_wSPeiaZjEf382×736 42.7 KB

UnrealEditorFortnite-Win64-Shipping_lPwLhCZMqj
UnrealEditorFortnite-Win64-Shipping_lPwLhCZMqj371×735 40.9 KB

UnrealEditorFortnite-Win64-Shipping_CyZ9TSYAw9
UnrealEditorFortnite-Win64-Shipping_CyZ9TSYAw9378×764 43.2 KB

Cog_Massive_Curvature_737ABDD8.PNG
Cog_Massive_Curvature_737ABDD8.PNG1024×1024 121 KB

Cog_Massive_ObjectNormal_6EF7644D.PNG
Cog_Massive_ObjectNormal_6EF7644D.PNG1024×1024 98.5 KB

Cog_Massive_AmbientOcclusion_8D127D33.PNG
Cog_Massive_AmbientOcclusion_8D127D33.PNG1024×1024 115 KB

uefn-attachments-2022.11.07-14.02.15.zip (2.2 MB)
Cog Massive.fbx (39.7 KB)

I also did an extra test to see if the smoothing groups are the cause, and generated polygroups (using “Generate New PolyGroups”) and that seemed to have fixed the issue (albeit the texture is now a little messy, there is probably a way that I ll figure out eventually to group them better):

Cog_Massive_Curvature_B45C5DC5.PNG
Cog_Massive_Curvature_B45C5DC5.PNG1024×1024 94 KB

Since this modelling workflow is a direct export from Blender, it would be nice to take into consideration that there is no smoothing group information, and ideally generate it before the bake begins as a little QOL to beginner modellers like myself (still keeping the unwraped version of the first textures, but removing the artifacts like the second curvature version).

2

So the issue here is that the UV map in the FBX has some real garbage in it, there are area where the triangles overlap themselves, and this makes it impossible to bake unique pixels for those areas. It appears that the top and bottom where unwrapped using a planar UV projection, and this unwrap included the “side” parts.

image
image1920×1139 126 KB

In your last photo it looks like you have not just generated new polygroups, but also generated a new UV unwrap, which, yes, will mean that the texture bakes can work properly. However this new UV unwrap isn’t in the source FBX, so you would have to export this asset as a new FBX file to use it in Mixer, so that the UV map you are importing into mixer is consistent with the baked texture maps.

3

Good to know about the pixels that are mixed, didn’t notice when I generated the cog. In regards to Mixer, I used the old maps so they can align (pre-polygon group generation). That means that the tool is working correctly. Thanks for the info