My stylized grass shader that works well for 3D pixelart style too: https://binbun3d.itch.io/godot-grass
Features
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Option to use a 2x2 texture atlas for variation.
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Wind based on noise texture
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Option to have grass blades be billboards.
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Options for smooth, dithering and cut alphas for more control.
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Wind based on a noise texture giving a wavy pattern
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Colors based on a gradient textures.
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Option to randomly pick parts of grass to have different color for highlights.
Changing colors:
Wind example from close up:
