All liquids use the same shader, originally using a simple fake liquid. It's now changed to have texture support, as well as having a waved top of the liquid that moves, as well as a few small changes with the textures.

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The main reason for textures on this materials is accessibility. We knew from the start that just having colours define the type of slime would make it difficult for colour-blindness. It's changed the look of them drastically, and they definitely look more fun now!

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Reference: Liquid.

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The main difference between the original slime materials and the ones used in the drinks are it's textures. The slimes have set coloured textures, and the drinks use greyscale versions.

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This is more for artistic purposes, as having the original colours on all types looked worse than what we achieved with custom shades of the colours.