Different techniques work for different types of designs. For example, the technique called vertical slit (where the weft threads meet and separate in opposite directions) is useful for shading, while slit tapestry technique (where weft threads do not share a warp thread as they turn) will give a sharp line of color change. Diagonal slit tapestry (where the slit caused by meeting weft threads is on an angle) is useful for building shapes.
See if you can guess the techniques used by perusing Ulrika’s liturgical tapestries, hospitality, corporate, public buildings, health care & residential tapestries, and available tapestries.