Unreal Engine Issues
Unreal Engine Issues
The CanLaunchURL() function does not do what it seems to imply that it does
UE - Foundation - Core - Jan 15, 2018The CanLaunchURL() function seems like it would check the provided URL to make sure it is valid. The comment for the function in GenericPlatformProcess.h appears to imply that this is what the funct ...
Cannot compile a nativized Blueprint with a function that takes an interface as an input parameter and uses it inside the function (e.g. dynamic cast to object).
UE - Gameplay - Blueprint - May 27, 2020Issue occurs because there is a legacy code path that forces all interface parameters to be declared as 'const' in function declarations, even if CPF_ConstParm is not set in exported C++ code. This ...
Blueprint - Crash when a function takes an event as a parameter
UE - Gameplay - Blueprint - Oct 10, 2016Looks like maybe we aren't replacing the source delegate function (SignatureFunction) reference on the UDelegateProperty after recompiling the class - the function's owner name has the TRASHCLASS pr ...
Cannot convert Blueprint Function Library inputs to local variables
UE - Gameplay - Blueprint - Sep 11, 2017When a blueprint function library function has input variables, the input pin cannot be converted to a variable / local variable. Regression: No - same behavior occurs in 4.16.3 ...
Dynamic Light placed inside of a Dynamic Static Mesh doesn't pass through the geometry
UE - Graphics Features - Jun 2, 2017Dynamic Light placed inside of a Dynamic Static Mesh doesn't pass through the geometry. The static mesh is not double-sided. User Description: It appears that in Unreal 4.16 one loses the ability ...
Show collision command turns on lights that have 'Visibility' set to false
UE - Graphics Features - Dec 2, 2019Running the console command "Show Collision" when lights are placed in the scene with "Visibility" off results in the lights turning back on. Tested in: 4.22.3 CL#7053642 , 4.24.P4 CL#10387632, 4 ...
Private functions can be called in other blueprints
UE - Gameplay - Blueprint - Nov 2, 2015Private functions within a blueprint can be called from other blueprints. A warning does appear but the function is run despite this warning. ...
Custom functions can call Set Timer nodes
UE - Gameplay - Blueprint - Nov 11, 2015Custom functions can call Set Timer nodes. There are no other time related functions that can be called through custom functions. Calling a timer through custom functions seems to lead to editor cra ...
Lighting channels not working as expected when enabling Ray Tracing Shadow
UE - Graphics Features - Lumen - Oct 13, 2020Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...
Blueprint Const Function Allows Array Clear
UE - Gameplay - Blueprint - Jan 11, 2017Attempting to clear an array in a const function returns no compiler error in blueprints. If you create the same setup in C++ using a const function, an error is returning upon compiling as expected ...