Hi, I`m currently on a project that is a sequel and also a port. The previous format had their textures scaled by a factor of 2x when ported for the prequel, so if the original .png had a 128 x 128 size, the new one for the HD counterpart got scaled up to 256 x 256.
No-one on my team seems to have a clue how the textures were scaled up last time, I`ve had some experience mucking around on GIMP and paint.net so I know the basics of such packages.
However, I cannot scale these images to 256 x 256 and make them look good. I`ve been using gimp and tried both linear and cubic filtering but the colors get too fuzzy. The textures are profile shots for dialog in a jrpg, and obviously in an anime style so their hair and skin has `highlights` and that`s where most of the noticable ugliness comes from.
Does anyone recommend a method to retain visual clarity when scaling to 2x the size?