This is an older post, but in case anyone else comes across this…
Had the same issue and unfortunately GranMinigun is incorrect. Full Precision is not accessible in the property matrix.
My solution was creating a c++ wrapper and calling a function with python.
snippet of c++ function lib code :
void MyCFunctionLibrary::setUvPrecision(UStaticMesh * StaticMesh, bool isPrecision)
NewBuildSettings.bUseFullPrecisionUVs = isPrecision;
FStaticMeshSourceModel& SourceModel = StaticMesh->GetSourceModel(0);
SourceModel.BuildSettings = NewBuildSettings;
then calling this in python would be something along these lines:
import unreal as ue
asset = ue.load_asset(’/Game/Assets/TestModel’)