A method of embossing a sheet material includes: heating at least a
portion of the sheet directly or indirectly with radiant energy from a
radiant energy source; pressing a tool against the heated portion of the
sheet, thereby patterning a surface of the sheet; and separating the
sheet and the tool. The radiant energy may travel through a solid
material that is relatively transparent to radiation, on its way to being
absorbed by a relatively-absorptive material. The relatively-transparent
material may be an unheated portion of the sheet, and the
relatively-absorptive material may be either the tool or the heated
portion of the sheet. Alternatively, the relatively-transparent material
may be the tool, and the relatively-absorptive material may be all or
part of the sheet. The method may be performed as one or more
roll-to-roll operations.