Unreal Engine Issues

Material compiler incorrectly generates error

Under certain conditions, the material compiler appears to detect errors where there are none. I debugged the particular case of the RGBtoHSV material function with JonathanL, and we believe that th ...

Anim Blueprint Debug Filter Changes Back to Default When PIE

workaround Debug Filter changes back to default when PIE. When playing - Shift + F1 to release mouse Debug Filter can be changed to what is needed ...

Editor crashes when assigning Landscape layer info while Forward Shading is enabled

Crash occurs when Forward Shading is enabled in Forward Rendering Options User noted that if "Support Stationary Skylight" in Project Settings > Rendering > Shader Permutation Reduction is disabled ...

t.MaxFPS 0 locks FPS to 120 instead of unlocking it in Viewport

When unlocking FPS in Viewport it defaults to 120 instead of potential max FPS. If you do this during Launch the 't.MaxFPS 0' or 't.MaxFPS -1' commands unlock the FPS to the max the GPU allows in th ...

Can't set a value of 0, 0, 320 in the rotation key editor

Set Hardware Cursor doesn't refresh when clicking and holding in PIE when dragging out and back in

The SetHardwareCursor function sometimes doesn't update when clicking and holding the left mouse button on a widget component, like a button, and causes the cursor to default back to its normal icon ...

Items in the Levels window can no longer be reorganized

Some changes were made to the Levels window for 4.17 which allowed sublevels to be organized into folders. It appears a side effect of this change was that levels can no longer be manually reorganiz ...

Fatal error when pausing and sleeping when using Launch Windows Game

When using the pause command in a launched game and putting the computer to sleep it causes the fatal error "GameThread timed out waiting for RenderThread" when logging back in and resuming work on ...

World-locked stereo layers for SteamVR are not positioned correctly

World-locked stereo layers don't seem to be in the correct place when viewed in SteamVR. In 4.16, if you Subtracted the difference of VR origin location and world origin location and offset the pos ...

Reordering Instance Editable arrays in a Character Blueprint breaks the array

When re-arranging an array that has been added to a character blueprint, the array adds an empty value to element [0] and leaves it in a broken state. I tested this using the Level blueprint as well ...