Thank you for the repely! I really glad that someone can always answers my question. I know baking normal map is very hard because even some tiny mistakes can make some big problem. I used a displacement cage to bake them but the problem is still not solve, then I try to push back that face in the high poly model so that it is inside of the low poly one but still nothing change. However, the thing is I found out that this problem doesn’t cause a serious issue, when I know at the model in normal map material it actually not bad! So should I still spend time to fix it so leave it alone? Once again thank you for helping me!
