Twofish MDS multiplication I wasted the last 2 days finding literature and/or some illustrative explanations on how to perform correct multiplications against the MDS-Matrix in Twofish over $\operatorname{GF}(256)$ with $x^8 + x^6 + x^5 + x^3 + 1$.

There seems to be no method - all algorithms I found are using pre-computed MDS tables, which isn't helping me understand it at all.

Could someone provide me with a simple and easy-to-use algorithm for this multiplication?
Each byte act as a polynomial in $\operatorname{GF}(2^8)$

You will multiply the elements of the matrix in (Galois Field) $\operatorname{GF}(2^8)$ and add them in $\operatorname{GF}(2^8)$

here is a link where you can find a wonderful explanation for $\operatorname{GF}(2^8)$