Explosions fail in edits for two main reasons: the scale doesn't match the picture, or the perspective doesn't match the camera. Use the sections below to write prompts that control the transient, low-end body, debris texture, and tail so the blast lands where you need it.
1) Start with source and scale
Tell the generator what's actually exploding. "Grenade" implies a tight crack and compact boom; "fuel tank" suggests a pop into a longer fireball body; "demolition charge" adds concrete break and rubble movement. Naming the source helps the attack and low-end size sound believable.
- Use size words: small, medium, massive, city-block scale
- Name materials: concrete, glass, metal shards, dirt, asphalt
- Call out motion: outward blast, upward fireball, collapsing debris
2) Choose distance and perspective
Perspective changes everything: close explosions have a strong transient and immediate body; distant detonations soften the attack and emphasize rolling rumble. If your shot is wide, ask for less crack and more tail. If it's close-up, keep the hit fast and avoid an overly long decay.
- Specify distance: close, mid-distance, far across a valley
- Mention camera feel: "heard from behind a wall" or "open air"
- Control tail length: short decay for cuts, longer aftershock for holds
3) Match the environment and reflections
The same explosion sounds different indoors vs outdoors. Indoors you'll hear strong early reflections and a tighter tail; outdoors you'll get a clearer transient with a longer, airier decay. Add stereo width when the scene is wide, and keep it tighter for centered action beats.
- Environment cues: concrete room, alleyway, forest edge, open desert
- Reflection cues: slapback, roomy reflections, minimal reflections
- Width cues: narrow/centered vs wide stereo rumble
4) What to avoid (common prompt mistakes)
Vague prompts often produce unusable results: either the boom is huge with no readable attack, or the debris is so noisy it masks everything. Avoid asking for too many contradictory traits in one line. If you need both the blast and the crumble, generate them separately and pick the best timing match.
- Avoid "super loud" as the only instruction—describe attack/body/tail instead
- Don't overload one prompt with five environments or multiple scales
- Skip cartoon terms if you want realism: use "gritty debris" not "comical kaboom"
