And at last some models are on a lowest definition (they are awesome too but someone looks a bit weird)
Reaver is a bit outdated he doesn't have a clear golden effect but anyway is ok
BW ultralisk is outdated, the coloration is not very detailed, but nothing of weird here
SC2 Ultralisk, is the most low definition model, because after the hots intro you had to increase the dimension of the picture to can match the ones of the cutscene, the problem is that now he looks really weird, just to say it and is not at the level of other zerg pictures
The MS Core is a bit strange, but i don't unerstand too how it could be drawn better, a good picture afterall.