When the template is laid on the car, the gap between the template and the car cannot exceed the specified tolerance. Normally it is measured three feet above the playing surface. ✔ Uniformity illuminance – a measure of the rate of change of illuminance expressed as a ratio between the illuminance level of adjacent measuring points on a uniform grid. For this template, that currently evaluates to autocollapse. All of the decals are installed, including headlight decals (NASCAR cars don’t have headlights), which helps make the race car look more like a street car. There are some major differences between the two types.