Hi I am a newbie here. Can I use the same normal map for symmetrical object like door (left and right) to use less resources. If I flip the resulting normal map of the left door for the right door?
Hey rracheltan , you sure can! Just be sure that it is a tangent space normal, which it most likely is.
http://wiki.polycount.com/wiki/Normal_Map_Technical_Details#Tangent-Space_vs._Object-Space