Normal blending.
Use ordinary alpha compositing.
Try it in your agent.
Use this prompt as a starting point. Review the result, then ask for the details you want to change.
A prompt to start from
Use Strata. Create a silent eight-second Strata composition with a wide coastal image and a translucent Sea square sliding across it. Use explicit Normal blending at 58 percent opacity so alpha compositing is visible; preserve the moving source underneath. A neutral Exposure headline and Denim label sit outside the image. Test against Multiply without changing any geometry or opacity.
A few useful details.
How do I try this with my agent?
Copy the prompt into your supported local agent with Strata installed. Review the preview, then ask for the changes you want. The composition stays editable as you refine it.
Where does the video render?
Strata previews and renders locally on an Apple Silicon Mac. The local engine is free; your agent’s subscription or usage costs are separate.
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Free local rendering on Apple Silicon Mac. Your agent’s costs are separate.