While true, there is a reason that the GLSL standard includes builtin data types for matnxm for all n,m in {2, 3, 4}. The single most common matrix operations i

While true, there is a reason that the GLSL standard includes builtin data types for matnxm for all n,m in {2, 3, 4}. The single most common matrix operations in computer graphics are related to linear transforms on color spaces and geometry. Both of those max out at transforms on 4D vectors, for RGBA and 3D projective geometry.