Photo Cast Tips for AI Rap Videos

Every AI rap video generator, ours included, has the same soft bottleneck: the cast photo. The model can only keep a face consistent if the face it starts from is readable. Here is the checklist we would hand a creator before their first render.

The five rules that matter

1. One person, one photo. Group shots and photobombs force the model to guess which face is the rapper.
2. Front-facing. Eyes to camera. A three-quarter turn is workable; a profile is not.
3. Even, flat light. Overhead sun and hard side shadows create patches the model reads as part of the face.
4. No sunglasses, no masks, no heavy shadow. Mouth and eyes are what lip-sync hangs on.
5. No beauty filters. Smoothing and reshaping fight the character lock and produce a "who is that?" result.

What "good" actually looks like

• A phone photo in daylight, taken at chest height, is usually better than a studio shot with dramatic lighting.
• Plain background beats a busy one — the model spends less capacity on the scene.
• Resolution matters more than megapixels: sharp is what you want, not large.
• Keep the original file. Screenshots and messaging-app re-sends strip quality.

Duo tracks

For a two-performer video, upload a separate photo per person, each following the same rules. Two faces in one upload is the most common cause of blended ("melted") faces.

Permission is not optional

Only upload faces you have the right to use:

• Get consent from the person in the photo.
• No minors without a guardian's consent.
• No public figures or celebrities.
• No deceptive deepfakes or content meant to harass.

Unauthorized AI likeness is a real, ongoing controversy — a tool that ignores it does not stay available for long, and the creator carries the risk.

Common failure modes and the fix

| What you see | Likely cause | Fix | | ------------------------- | --------------------------- | -------------------------------------- | | Face drifts between shots | Low-res or filtered source | Re-upload a sharp, unfiltered original | | Mouth shapes look wrong | Vocal buried in the mix | Export a cleaner vocal, regenerate | | Face looks like nobody | Group photo or heavy shadow | Use a solo, evenly lit photo | | Two faces melted together | Both people in one upload | Split into one photo each |

Testing cheaply

If you are unsure about a photo, run the cheapest quality tier first (480P, 150 credits). If the face lands, redo it at the higher tier (720P, 300 credits). That is also how the credit model is built — per-video cost, no subscription.

FAQ

Can I use a selfie? Usually yes, if it is sharp, front-facing and unfiltered. A selfie taken in a car at night with a filter is not the same photo as a selfie taken by a window in daylight.

Can I use a photo I found online? No. You need permission from the person in it, and you need the right to use the image itself. Celebrity photos are out.

My photo is good but the video still looks off. The photo is one lever, not the only one. Check vocal clarity, shot length and whether the cut lands on a wall of double-time ad-libs.

Does image quality matter more than resolution? Yes. A sharp 1024px photo beats a soft 4K one. Downscale, crop to head-and-shoulders, and avoid upscaled or AI-restored images that already have invented detail in them.

Will you train a model on my photo? No. Hookai does not train models on user photos; we process the file to render your video and host the result for 7 days.

Ready?

Open the generator, start with 480P, and compare two candidate photos before committing to a full track.