New Tute on SU to WrapR to Substance to Unity
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Focuses on using two models...one a very low poly model (48 vertices) the other a much higher quality model (over 4K vertices). Bake the details from the high poly model, including different parts and textures, onto the low poly model. This is an EXTREME case, but it does show what can be done.
Uses Rich O'Brien's WrapR UV plugin.
HTH.
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