Post crash photos when you need a second opinion on what is cosmetic, what can be repaired, and what should be replaced before the next run or flight.
Show the whole model first, then close-ups from multiple angles. Include what hit, roughly how fast it was moving, materials involved, and any binding, cracks, bent shafts, unusual sounds, or damaged wiring you found.
For aircraft and helicopters, inspect load-bearing structures, shafts, blades, links, gears, and fasteners carefully. If a critical part is questionable, replace it rather than testing it in the air.