A wide variety of textures can be found in nature. I think especially with leaves, you can find great structures. I have photos here that you may only remotely refer to as texture. But I think that if you expand your view you will find textures in a lot of observations.
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I post on:
https://www.pictrs.com/akinome-l?l=de and
eyeem: https://www.eyeem.com/u/akinome and
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and Instagram as Akinome_L
