Oil

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BenefitMakes a storm feel physical through raised paint.RiskFast movement can turn brushwork into a smooth surface.Next testHold a wave crest while paint texture remains visible.

Glass

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BenefitGives the world jewel-like light and a strong frame.RiskA moving character can break the fixed lead-line structure.Next testMove light across the window before moving the depicted figures.

Shadow

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BenefitMakes silhouettes and travel direction immediately legible.RiskSmall acting details are hard to read in silhouette.Next testTest a clear side-on walk with readable joints.

Clay

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BenefitGives the human reunion a tangible miniature scale.RiskSeparate close-ups can lose the spatial path.Next testHold bubble, reunion and exit in one continuous shot.

Ink

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BenefitLets a material change grow into a world.RiskRapid movement can hide the delicate wash and empty space.Next testLet black ink become colour without changing bridge position.