you spec looks like a tweaked version of your diffuse...bad...white areas of rock are often more chalky- therefore more diffuse than dark smoothed parts that only look bright through specular...add a multiply layer and mask it with the lightest part of you texture then re-level the whole thing......and also add a few…
Hi Kuki, welcome to Polycount. Your texture is looks nice so far but I guess you can achieve a better result by spend some more time to rework the textures. As Duxun says, the normal map is to less and should be much stronger, should be look better if the stones comes much more out. To the specular... You should not only…