Hi
It states in the bug report that it cannot be reproduced, but on the left says that it can be reproduced in 4.19.0 and 4.20.0
I have been able to reproduce this bug myself and searching to see if it already existed was how I found it. With the high number of votes I’m guessing a lot of people are also experiencing this.
Has the status for this been labeled wrong?
UE-56344
Looks like there is a fix for half the problem but the baked light reflections are still the wrong way around.
Ok I manged to find out that this was fixed when Epic added code for Rect lights
The fix to make the reflections of the baked lights with a source length > that 0 have the correct rotations are in SceneVisibility.cpp
PostVisibilityFrameSetup
Replace this
const float ZScale = FMath::Max(LightParameters.LightSourceRadius, LightParameters.LightSourceLength);
DrawSphere(&LightPDI, Origin, FRotationMatrix::MakeFromZ(LightParameters.NormalizedLightDirection).Rotator(), FVector(LightParameters.LightSourceRadius, LightParameters.LightSourceRadius, ZScale), 36, 24, ColoredMeshInstance, SDPG_World);
with this
FMatrix LightToWorld = Proxy->GetLightToWorld();
LightToWorld.RemoveScaling();
//Grabbed from the update when Epic added RECTLights
if (LightParameters.LightSourceLength > 0.0f)
{
DrawSphere(&LightPDI, Origin + 0.5f * LightParameters.LightSourceLength * LightToWorld.GetUnitAxis(EAxis::Z), FRotator::ZeroRotator, LightParameters.LightSourceRadius * FVector::OneVector, 36, 24, ColoredMeshInstance, SDPG_World);
DrawSphere(&LightPDI, Origin - 0.5f * LightParameters.LightSourceLength * LightToWorld.GetUnitAxis(EAxis::Z), FRotator::ZeroRotator, LightParameters.LightSourceRadius * FVector::OneVector, 36, 24, ColoredMeshInstance, SDPG_World);
DrawCylinder(&LightPDI, Origin, LightToWorld.GetUnitAxis(EAxis::X), LightToWorld.GetUnitAxis(EAxis::Y), LightToWorld.GetUnitAxis(EAxis::Z), LightParameters.LightSourceRadius, 0.5f * LightParameters.LightSourceLength, 36, ColoredMeshInstance, SDPG_World);
}
else
{
DrawSphere(&LightPDI, Origin, FRotator::ZeroRotator, LightParameters.LightSourceRadius * FVector::OneVector, 36, 24, ColoredMeshInstance, SDPG_World);
}