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When you render the particles everything will be displayed with the node's default → colour colour (see split image below). With “UV channel” it is possible to transfer the colour distribution to the rendered image. In conjunction with particles you simply have to choose a channel from
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- From “UV channel” choose the attribute you want to visualize, e.g. "Velocity".
- Adjust the → colour gradient under “Mesh range color”.
- Use "Range min | max" to enhance the channel's contrast.
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