Unreal Engine Issues

DistanceToNearestSurface used for post process broken when separate actor culled

This one may not necessarily be a bug, as this is related to the nature of culling. If it is not, please let me know if there is an alternative method the licensee could use here in order to track a ...

Crash in virtual texturing when material instance texture sample param is switched to a non-square texture

The 4kVT is applied correctly, and you can switch the master material sampler to use the 2048x1024 texture, but if you switch it via the material instance param instead, the crash occurs. ...

Motion blur on player/weapons with TAA

Looks like this can occur with motion blur off aswell, so likely it's a TAA motion vector issue. Similar issue occurs in UE5 (see [Link Removed]) ...

Objects in AR not synced well with camera movement on iOS

Ornatrix Alembic files display unnatural movement in Groom after import

Video of the issue here - [Link Removed] ...

Uninitialized Critical Section exception error in Niagara/VectorVM when gflags application verifier enabled causing potential Memory Corruption

The following is posted from the user who submitted this issue: We noticed a crash happening in a certain area of our game, and the debugger showed it appeared to be attempting to free an invalid m ...

bUseAsOccluder not taking effect when prepass is disabled

See the licensee discussion for details discussed with [Link Removed] ...

RHILockTexture crash with ray tracing enabled

Looks like it's a resource state tracking assert issue on the resource. ...

Material Instance changes are not propagating to layers.

Please note, during this repro, when I attempted to change the colour of the layer_inst using the colour wheel, it would not save the updated colour. This may be a separate bug. ...

EyeAdaptation node is not working in Decal

It is working correctly in 4.25.4. In 4.26.2, it is not working. It is also not working in UE4main 16382403. ...