Unreal Engine Issues

Enabling Skeletal Mesh 'Per Poly Collision' crashes the Editor

When a Skeletal Mesh isn't assigned, enabling Per Poly Collision on the Skeletal Mesh Component causes the Editor to crash. This issue was reported and tested in 4.20.1 (CL-4233996). This issue was ...

Metallic Materials Get Darker When Directional Light Is Set to Movable

Metallic materials get darker when directional light is set to movable. In 4.19 the same material will render dark in all mobility of the directional light. Found in 4.19 CL# 4033788, 4.20 CL# 4233 ...

Changing Frame Buffer Pixel Format to Float RGB Causes Editor to Crash

Changing Frame Buffer Pixel Format to Float RGB Causes Editor to Crash. Unable to test in 4.19 due to setting not being available. Found in 4.20 CL# 4233996 and 4.21 CL# 4299102  ...

Material Function Input Displays Incorrect Data Type for Volume Texture, Static Bool, Material Attributes, and External

The material function Input Displays incorrect data type for Volume Texture, Static Bool, Material Attributes, and External. The function will still work properly however the type data is displayed ...

"Enabled per poly collision" under "Support compute skincache" is ON causes a crash at runtime

It seems that "Enabled per poly collision" with "Support compute skincache" causes a crash at runtime immediately. We can easily reproduce it with ContentExample. The logs at the crash timing... L ...

Cloth simulation doesn't work correctly if Compute Skin Cache is ON.

It seems that cloth simulation doesn't work correctly on 4.20 if Compute Skin Cache is ON. We can easily repro it with Content Example [Link Removed] Is this by design? ...

Crash on garbage collection - Encountered 20 object(s) breaking GC Clusters assumptions.

Garbage collection crash during opening cinematic. Note after crashing and relaunching the game the saved file appears as 8% complete instead of 0%. Note this crash is also occurring with //UE4/D ...

Instances missing when importing .Udatasmith containing Forest pro entities

Linker Object (Unresolved Export) Crash on Standalone Exit

Crash when exiting standalone. "we have an export that is never getting resolved, this is the export that is causing the mislink error when shutting down the game" Please see UDN post for more info ...

Incorrect native code generation when Blueprint nativization is enabled for objects instanced through the editor and assigned to an instanced object reference property on the CDO

When converting a Blueprint class to native C++ code, we're not currently distinguishing between an instanced default subobject assigned to an instanced object reference property within the CDO that ...