I'm looking for software what can turn 2D pixel art height maps to smoothing-less, crispy looking normal map. It must be compatible with Ubuntu(or at least run fine under Wine/Crossover). I have prepared height maps where is white hight and black low. On windows I used NJob but it done terrible job and I have to redone normal maps after I switched from Windows to Ubuntu. Preferable free or open-source, alternatively I can get together 15$

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