Considering you're already using bp editing, I believe you should improve the fit of the heatshield to the side of the shuttle rather than making a box and calling it a day.
not a judge but you need to show the entire rocket in the build screen. I also don't see any heat shield on the nose. I don't see how it can survive reentry without becoming the Columbia
not a judge but you need to show the entire rocket in the build screen. I also don't see any heat shield on the nose. I don't see how it can survive reentry without becoming the Columbia