First of all thank you for your answer.
However, the method you told me is useful, but I think the method of inverting the normal is difficult in a situation where I have to do 3 types of mapping.
Based on the ideas you gave me, I thought of a way.
All of them were not selected, but only the polygons visible from each camera angle were selected and stored, and then materials were assigned to each selection.
However, I don't know if it's an error, but when using the selection tag, materials using alpha do not overlap, and depending on the priority of the material, it is not applied to a specific polygon.
So, in the end, the way I thought was to split each selection tag to make each object, extrude it very finely, and solve it by attaching a sticker.
The ideas you gave helped me come up with a solution.
Thanks again for the reply.