Unreal Engine Issues

Material functions using Vertex Interpolators called by multiple function nodes will only use the final interpolator result

The interpolator in each function call does correctly compile it's input to a temporary, but as there's only one actual expression node, each call stomps the temporary data so the final CompileInput ...

Light Propagation Volumes Not Affected by Emissive Area Light

The light propagation volume is not affected by a material with emissive area light enabled. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4246589 ...

Capture Source not changing in Planar Reflections

Changing the Capture Source in Planar Reflections is not working as expected. Without being able to change the source, Post Process Materials are not rendering in the Reflection. Reported in versio ...

Image widgets need to be invalidated (once) before material parameter can cause changes

The cache for images inside of an invalidation box needs to be invalidated at least once before changing a parameter that is applied to the material of the image will have an effect. ...

Materials Draw through a HUD blueprint do not update when collections Parameter are used

Materials applied via HUD do not appear to update when collection parameters are changed for the applied material ...

Struct Ref pin in Set members in Struct node can be split

Attempting to restore the structure pins of a set members in structure node duplicate the structure input or member variables of the structure. Regression (no) issue (does) occur in 4.11.2 ...

Remove button doesn't work when painting skeletal meshes

Materials on deleted children are applied to camera

Materials on deleted children are applied to the camera when inside of an actor blueprint. This issue does not appear to be a regression. Versions Tested: Issue occurs in all versions Tested 4.16.3 ...

Exponential Height Fog renders incorrectly after Set World Origin Location

When having an Exponential Height Fog actor far away from origin, after doing Set World Origin Location, Exponential Height Fog's appearance changes. ...

When disabling material curve in Persona, the viewport will not update correctly until Persona is reopened

In Persona, when disabling a material curve, the viewport will play the curve at the value that it was disabled at, rather than at value 0. The viewport will only show it correctly once Persona is ...