"Rendering Settings->Do Not Clear Scene" causes visual artifacts in editor panels

Rendering - Dec 4, 2014

Setting Project Settings->Rendering->Optimization->Clear Scene to "Do not clear" prevents the scene from clearing even in editor window viewports, such as the Components tab of Blueprints and the Pr ...

Distance Ray Traced Shadows causing stripe shadows across meshes

Rendering - Dec 4, 2014

User provided a project that the Distance Ray Trace Shadows are generating stripes across the meshes. Cascade Shadow Maps are also (if turned on) generating a series of stripes in the transition zo ...

Using the "-opengl" commandline argument on a client project will trigger an Access Violation breakpoint.

Rendering - Dec 3, 2014

Running a client in debug mode in Visual Studio with the "-opengl" commandline argument will trigger an Access Violation breakpoint. ...

Color Information Clamped to a Max of 1 in Cascade Color Modules

Rendering - Dec 3, 2014

You cannot enter a value higher than one in any color module. WORKAROUND - You can graph it and select the point you want to change and then set value to any number, but it will be clamped back to ...

Visual glitches on Mac OS X using an Intel GPU while playing HW accelerated H264 video

Rendering - Dec 2, 2014

This looks to be a system driver bug, but logging here for transparency and future reference. It took me a long while to figure out that the key issue is a conflict during blit between UE4 and the H ...

GPU Particles will not Rotate based on a negative Int Rotation Rate Value

Rendering - Dec 1, 2014

GPU Particles will not rotate based on a negative input from a uniform distribution via Initial Rotation Rate ...

Adding a Scene Capture 2D to Render Target will override Motion Blur settings in level

Rendering - Nov 24, 2014

With a Render Target From Scene Capture 2D setup in a level , the motion blur settings from a global post process volume is overridden. Was investigating Scene Captures picking up Motion Blur when ...

Discrepancy in rendering between Perspective and Orthographic Viewports

Rendering - Nov 20, 2014

Perspective and Orthographic views render differently. Ortho views use a tonemapper with no gamma. ...

Importing User Camera FBX into Matinee in Matinee Fight Scene Crashes (UE4Editor_Renderer!CalculateShadowFadeAlpha())

Rendering - Nov 20, 2014

Importing user provided Camera FBX will crash on closing the Matinee window in Matinee Fight Scene level. I cannot reproduce a crash in a blank project with this asset. Attached: Crash.zip - Inter ...

Post Processing continues to affect Sprites after project setting defaults are disabled and all volumes and cameras' settings are disabled

Rendering - Nov 19, 2014

After disabling the defaults in Project Settings > Rendering > Default Postprocessing Settings, disabling all GlobalPostProcessSettings volumes, and setting the Post Process Blend Weight in the play ...