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Volume trails to text?

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Im still new to houdini but Ive created renders using volume trails after following a couple of online tutorials. For example, my render is the one with the trails running over the white surface. If you look at the one done with the blue background (created by the guys over at Deskriptiv.de), they have somehow gotten the trails to form to the numbers 05 13. It looks super cool and im not quite sure how they did this. If anyone wants my scene file, I have uploaded it but im sure most of you on this forum know how to create the effect. Rendered in octane. 




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Hi, to achieve the numbers look, you can try to increase your noise frequency in areas where you want your text. For example you can create fog volume and sample it in vops and drive your noise frequency with that. That should give you similar results :)

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