Feature requests, feedback and ideas for the HeyGen team

Product feedback & requests

Clearly described actions (walking, stopping, small jumps, controlled gestures) are executed only partially or are reinterpreted by the system.

Additional acting not requested in the prompt 

The animation generator makes uncontrollable creative decisions

Automatic insertion of background or ambient music.

Unexpected changes in light intensity and background behavior that are not defined in the prompt.

, the system automatically added audio or English voice.

Disabling dialogue does not always fully prevent sound generation.

Practical limitations of the motion-prompt system

Although the documentation suggests that movements can be fine-tuned, in practice the level of control is 

There is no real control over the animation engine or the render pipeline.

internal templates are prioritized over user prompts

Technical conclusion after multiple tests

The limitation lies in HeyGen’s animation engine, which currently:

Is optimized for talking avatars and presenter-style content 

Is not designed for creative body animation, complex acting, or precise cinematic direction 

This significantly limits realistic expectations regarding what type of motion can be achieved within HeyGen.

HeyGen support was contacted with screenshots and concrete examples, requesting clarification on:

Which types of movements are truly supported 

Which automatic behaviors cannot be disabled 

What the real system limits are depending on the active plan 

The official HeyGen guide was reviewed and applied:
 

“How to Fine-Tune Avatar Movements with Motion Prompts”

https://help.heygen.com/en/articles/12805098-how-to-fine-tune-avatar-movements-with-motion-prompts

Even when following these guidelines, results remained inconsistent and not fully controllable.

Awaiting an official response from HeyGen to clearly define 

what can and cannot realistically be achieved

 with the current animation system before proceeding with more complex productions.

Motion instructions are not reliably respected

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