Unreal Engine Issues
Unreal Engine Issues
Editor preview window for CurveLinearColorAtlas does not automatically update when their CurveLinearColor asset is changed
UE - Graphics Features - Nov 12, 2024When the CurveLinearColor asset assigned to a CurveLinearColorAtlas is edited (e.g. change the colors of the gradient), the preview window of CurveLinearColorAtlas editor does not automatically upda ...
Copying and pasting a material function renders all of the duplicates inputs as not having default values
UE - Rendering Architecture - Materials - May 22, 2019The top material function was placed in a graph directly. The second was generating by copying the first node. Note that the input pins changed color which indicates that each input on the new modul ...
SingleLayerWater with PixelDepthOffset gives wrong refraction
UE - LD & Modeling - Terrain - Water - Oct 29, 2020We can see refraction gets distorted after we have a bigger PDO value, and it's not because the depth is more shallow, but looks like some kind of scene color texture lookup error. Also, not sure i ...
PSD imported texture has white for texels with 0 alpha, resulting in bilinear interpolation artifacts
UE - Editor - Content Pipeline - Import and Export - Aug 14, 2017Texture viewed in texture viewer has white fringes [Link Removed] This appears to be caused by transparent texels having white stored for their color, which causes artifacts with bilinear interpol ...
Alpha Compression Artifacts
UE - Graphics Features - Nov 23, 2018Confirmed in Main 4.22 @ CL 4586854 in 4.21 Alpha looks to be about 1 pixel larger than other channels in certain parts of the texture "The issue is not improved by changing compression settin ...
Navigation system not handling component hierarchies properly
UE - AI - Aug 18, 2015Lots of details on the related UDN thread. In short, Navigation System is not handling properly deep component hierarchies. I've added a test map for this to AIProject, it's ComponentHierarchyOnNa ...
Seam visible when using a material with BumpOffset on a Nanite mesh
UE - Graphics Features - Nanite - Sep 18, 2025When a material that uses BumpOffset is fed into the Emissive Color of Surface Opaque Default Lit material and then applied to a nanite mesh, a visible seam can be seen along edges and the intersect ...
Level Blueprint zoom value is different for different templates.
Docs - Samples - Jan 30, 2017I'm not sure where to set this value, but it's extremely noticeable when the value defaults to -7 and you go and place a node and it looks like a colorful square smaller than your fingernail. I tri ...
Crash spawning actor with instance editable gameplay tag property that was changed inline
UE - Foundation - Core - UObject - May 6, 2020REGRESSION Does not occur in 4.24 Crash occurs if the user spawns an actor with an instanced editable Gameplay Tag node that was changed on the spawn node. Another user reported this happening wit ...
Can not find abstract class in actor class dropdown list in GetAllActorsOfClass node
UE - Gameplay - Blueprint - Dec 15, 2020The behavior of non-variable class pins has changed in 4.26 where abstract classes like AInfo are being excluded from class pickers for general utility functions like GetAllActorsOfClass. This is no ...