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Can we obtain this in 3DGS without knowing HLSL?






Yes we can. I haven't seen this scene in motion, but everything shown on the screen (except DOF? the wolf's back is blurry) can be done without HLSL, the only shader you need is improved overlay, with alpha-test transparency, for correct sorting for the bushes. I don't understand why have you chosen this screen, it doesn't show any shaders, it's just very good artwork