Unreal Engine Issues
Unreal Engine Issues
Resetting material instance parameters to default value does not update the appearance of the object that the material is applied to
UE - Rendering Architecture - Materials - Mar 10, 2025When a material instance with exposed parameters is applied to a landscape; the parameters set to a new value and then reset to back the default value, the landscape does not respect the new default ...
ActorColoration mode is broken in a package.
UE - Graphics Features - Dec 2, 2025The coloration mode should just work. You may be able to temporarily workaround the issue by disabling PostProcess. ...
Incorrect Sampler Type of Normal Texture Samples for M_CobbleStone_Rough Material from Starter Content
Docs - Samples - May 6, 2015The M_CobbleStone_Rough Material from Starter Content needs to have all the Normal Texture Sampler Types set to 'Normal' from 'Color' ...
iOS package with Metal Desktop Renderer renders reflections incorrectly
UE - Rendering Architecture - RHI - Apr 15, 2022When having Metal Desktop Renderer ON, the project renders incorrectly and shows a coloring/lighting issue on the character's reflection. ...
Depth of field and Refraction issue
UE - Rendering Architecture - May 15, 2024Refraction does not adjust the scene depth texture, leading to a mismatch between Scene Color samples and Scene Depth samples. ...
Niagara crash when using a particle attribute reader that has been passed around between modules
UE - Niagara - Oct 28, 2025The following Niagara usage pattern results in either a crash or in incorrect data being read from a Particle Attribute Reader: Emitter Spawn Stage – A module has an Attribute Reader input specifie ...
Could not delete reference in specific level sequence
UE - Anim - Sequencer - Jun 12, 2018Could not delete reference in specific level sequence. It seems to be a soft reference because it becomes a reference for pink color, but I do not know where it is being referred. ...
Fbx exporter do not support material instance
UE - Editor - Content Pipeline - Import and Export - May 15, 2020The fbx exporter should support material instance to export the same result has the user see in the content browser or in the level editor. ...
[VariantManager] Over exposure when using image from file as thumbnail
UE - Editor - Content Pipeline - Variants - Jun 10, 2024This is a sRGB color space issue. Potential solution: Use regular texture import instead of FImageUtils::ImportFileAsTexture2D in ThumbnailGenerator::GenerateThumbnailFromFile ...
Invalid GUIDs on new material instance parameters cause overrides to break on base param rename
UE - Rendering Architecture - Materials - Sep 3, 2025When a parameter value is assigned on a newly created material instance (constant or dynamic) using Set***ParameterValueInternal, the parameter’s ExpressionGUID is left invalid (0,0,0,0). Parameter ...