message: UE4 compatibility.
diff: #include "Cesium3DTilesSelection/GltfContent.h"
  #include "Cesium3DTilesSelection/RasterOverlay.h"
  #include "Cesium3DTilesSelection/RasterOverlayTile.h"
  +#include "CesiumCommon.h"
  #include "CesiumGeometry/Axis.h"
  #include "CesiumGeometry/AxisTransforms.h"
  #include "CesiumGeometry/Rectangle.h"
  @@ -1820,7 +1821,15 @@ void UCesiumGltfComponent::AttachRasterTile(
  const glm::dvec2& scale,
  int32 textureCoordinateID) {
  +#if CESIUM_UNREAL_ENGINE_DOUBLE
  FVector4 translationAndScale(translation.x, translation.y, scale.x, scale.y);
  +#else
  + FLinearColor translationAndScale(
  + translation.x,
  + translation.y,
  + scale.x,
  + scale.y);
  +#endif
  forEachPrimitiveComponent(
  this,
  