Big yellow grains develop by coalescence of individual grains (see animation). With strain, however, these large grains become separated by the formation of steep Sb microshears (black pointers). As a consequence of continuous deformation by intracrystalline gliding, the newly formed grains elongate and their long axes rotate synthetically. Strain compatibility in between the rotating grains is maintained by antithetic (dextral) shear movements along the rotating  Sb microshears. At low to intermediate temperatures, new grains develop by subgrain rotation along these microshears (e.g. IT-HS experiments, see small magenta grains in the animation) whereas at higher temperatures the grain boundary bulges becomes an asymmetric shape by continuous shear movements.