I made these low poly stuff for a small project. Sometimes you need simple cars to fill empty roads in a city or a busy town. Other times you need cars for a game engine. These are perfect for that. I used 20 of these airplanes and 8 of these cars for my project and still the render was very fast; below a minute! This doesn't mean that they are too basic since wise texturing and materials have been sought to make it reliable and relevant. They are not meant for a very close camera zoom (only the airplane). Otherwise, you may ruin a very beautiful render. When placed far from the camera, it gives a believable shot. The airplane as well is meant to fill empty space or for an airport model. I wish you happy blending.