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I'm trying to realistically model the surface of a river using PShapes and shaders. I'm using a matrix of PVectors to create movement representing the waves (this part is where the realistic part will come into play). My problem is that when I try to add a texture, it does not look right. I render the shape by adding all the PVectors as vertices and then add an image from the surface of a real-life river as a texture. Any tips/advice/links to tutorials etc. would be greatly appreciated. Many thanks!