Counteract flickering when STL URL is changed

[gandreadis]

Hi, thank you for the library! I have an issue: I want to switch between STL files being shown, but when the url of the STL file is changed, there is a flickering motion where the new object very shortly is shown in the left-top corner, with only half of the object being visible in the viewport. Only after that is it positioned in the correct initialPosition. Would it be possible to directly render the object in the correct position after STL-change? I would prefer the scene to be temporarily hidden to this flickering motion.