animated-loop

Generate a reference still image, then call summer_generate_video with the ltx model, duration 5, the reference imageUrl, and a prompt using ambient loopable verbs like drift, flicker, or shimmer plus the phrase looping, seamless. Poll summer_check_job until the job completes.

Use ltx for loops in most cases: it costs $0.10, runs in about 30 seconds, and handles short ambient motion well. Use minimax for anime aesthetics or kling only for premium centerpiece splashes; kling-turbo and veo3 are text-to-video only and reject imageUrl inputs.

Seams appear when motion crosses the frame without returning, lighting drifts, or movement is too fast to close in 5 seconds. Regenerate with prompts like slow continuous returning motion or constant lighting; after three failed attempts, crossfade two VideoStreamPlayer nodes with a Tween.

No, Summer Engine only loads .ogv video; there is no bundled MP4 or WebM plugin. Transcode generated clips with ffmpeg using libtheora before importing, otherwise summer_import_from_url rejects and rolls back the import.

No, aspectRatio is only applied on the text-to-video path. On the image-to-video route the clip inherits the reference image's framing, so a portrait splash requires a genuinely 9:16 reference image.

Avoid loops for marketing trailer shots, narrative cutscenes, static splash images, or UI element animations. Use a still TextureRect for static art, GDScript Tweens or sprite sheets for UI animation, and dedicated trailer or cutscene skills for narrative footage.