How would I add a bevel in normal map only?

meejeebee

I’m modeling a low poly bed wood frame, and I would like to add a edge bevel in the normal map only.

If the wood frame was perfectly straight I’d use a trim sheet for the normals to achieve that perfect 45 degree bevel. However, my bed frame is curved in a wave shape. 

How would I achieve a normal map bevel for something like this?

Fabi_G

Hi! Best share an image of the bed frame to illustrate the situation. I don't see how the frame being curved prevents mapping its UVs to trims.

meejeebee

It's a curved arch like this. How would I make the UV's so that they match a bevel trim sheet? 

Eric Chadwick

Straighten out the UVs.