M_Cave_Ground_Mud has an error which keeps floor in Particle Effects Sample from Rendering

Docs - Samples - Sep 29, 2015

Something must have changed with how LERP's or Vector Transforms deal with a float 0 value, which breaks this particular material Error:[Image Removed] Fix:[Image Removed] ...

NavMesh does not build correctly to SkeletalMesh collision

UE - AI - Mar 16, 2015

NevMesh cuts out holes for collision incorrectly with Skeletal Meshes. Skeletal Meshes with "Can Ever Affect Navigation" set to true and that have a Physics Asset are capable of causing this. ...

Reduced Tessellation at edge when using world displacement

UE - Graphics Features - Jan 11, 2016

Adding a material to a mesh that is affected by world position offset has reduced tessellation around the meshes edges. This is seen when viewed in wireframe and is influenced based off of the angle ...

Opacity of Translucent Materials in UMG Retainer Box Inconsistent

UE - Editor - UI Systems - Jul 14, 2016

Using a translucent material with a 0 opacity does not seem to be working when using a retainer box that is attempting to apply it to the image. When the material is set to additive or masked, it w ...

GetSoftBounds for SteamVR Chaperone returns bogus numbers with VRmonitor not running

UE - Platform - XR - Aug 29, 2015

The "Get Soft Bounds" node returns bogus numbers instead of just all 0's if the VRMonitor is not running. Found on UE4-Releases 4.9: CL-2673023 ...

Having Mirrored UVs Breaks Render To Texture Even When Using Different UV Channel

UE - Graphics Features - Oct 24, 2016

If the static mesh has Mirrored UVs on channel 0 it will mess up the "Unwrap UVs for Render" functionality even when using a different channel for UVs that don't have mirrored UVs. ...

meta specifier ArrayClamp does not work with array in struct

UE - Gameplay - Blueprint - Sep 14, 2016

Giving an int32 variable the specific ArrayClamp has no affect when the specified array is defined inside a USTRUCT(). Variable is able to be set to a value outside of specified struct's range. ...

Memory increase when exiting PIE with Project Settings open

Tools - Nov 30, 2016

Memory increase when exiting PIE with project settings open Regression: YES Broken: 3195953 (4.14.0) Worked: 3195953 (4.13.2) ...

Can't undo blueprint/material movement done by arrow keys

UE - Gameplay - Blueprint - Feb 8, 2017

When moving nodes in materials and blueprints using the undo option doesn't undo the movements made by the arrow keys. This issue affects anything that uses nodes on an event graph. ...

2D Blendspace breaks when aligning samples in a straight line

OLD - Anim - Mar 9, 2017

2D Blendspace breaks when aligning samples in a straight line Regression: YES Worked: 3249277 (4.14.3) Broken: 3299760 (4.15.0) ...