Procedural Foliage Volume: Simulate() function doesn't work in Blue Print

Tools - Foliage - May 10, 2019

Procedural Foliage Volumes can be resimulated by clicking the Resimulate button. But they can't be resimulated from Blueprints, even if there is a Simulate() function that can be executed. Found in ...

[CrashReport] UE4Editor_TextureFormatDXT!FNVTTCompressor::FNVTTCompressor()

Core - Cooker - Dec 1, 2017

This is a common crash that has occurred since at least 4.12. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to [Link Removed]. ...

Root Motion interpolation is incorrect when use URO

UE - Anim - Runtime - Aug 3, 2018

According to Licensee's report, Root motion is incorrect when use URO. I Investigated, in the case of "Montages Only" become TrailMode in URO. Normally Animation Interpolation has implementation, ...

Documentation for Geographically Accurate Sun Positioning contains Incorrect Definition for Longitude and Latitude.

Docs - Jan 28, 2019

Incorrect definitions for Latitude/Longitude in Documentation for Geographically accurate sun positioning.  https://docs.unrealengine.com/en-us/Engine/Rendering/LightingAndShadows/SunPositioner Ex ...

Packaged Builds with DX12 Crash on 2nd Start

UE - Rendering - Oct 18, 2018

Running a packaged game with DX12 will crash on launch every second start and after. If you delete the files with the .ushaderprecache extension that are in the ProjectName/Saved folder the exe star ...

Static shape components need to have Dynamic Obstacle set to actually use Area Class

UE - AI - Navigation - Nov 17, 2020

Many licensees like to use ShapeComponents as blocking volumes instead of proper volumes, as they can be more easily placed and sized in the editor. The docs and code make it sound like it is possib ...

PDI-DrawPoint - Zoomfactor being calculated incorrectly

Rendering - Feb 20, 2017

A licensee has reported that the ZoomFactor variable inside of the DrawPoint function is being calculated incorrectly. It currently is calculated using the lesser of the projection matrix's horizont ...

FBatchedElements::Draw - OrthoZoomFactor can be reset to 1.0f if Line.bScreenSpace is ever false

Rendering - Feb 20, 2017

A licensee has reported that the Draw function in BatchedElements.cpp can set the OrthoZoomFactor (not a local variable) to 1.0f if Line.bScreenSpace is ever found to be false. The line this can oc ...