On 11/10/2007, Roderick Colenbrander <thunderbird2k at gmx.net> wrote: > + "MUL index.x, index.x, constants.x;\n" /* Scale the index by 255/256 */ > + "ADD index.x, index.x, constants.y;\n" /* Add a bias of '0.5' in order to sample in the middle */ Why not use a MAD there?