A couple of you have emailed me to let me know that someone going by CakeInferno might possibly be the long-lost Greyfirefox under a different name. I've conversed with him and can confirm that, yes, CakeInferno is Greyfirefox. The reason he disappeared was due to overly critical comments from some "hard-core Star Fox fans." They were badgering him about the technical accuracy of his Krystal rig and animations to the point that he was no longer enjoying himself.
After taking a break from the internet for a while, he has returned to do 3D graphics once more under this new name. However, this time he is focused on subject matter that is mildly NSFW using different, but similar characters. It is because of this potentially NSFW content that I urge caution if you wish to view his new gallery directly.
Meanwhile, Greyfirefox will be sending any future Krystal content to the Krystal Archive for posting, to the possible exclusion of his own gallery. No word yet on how often and what kind of content that will be, but he did state that he will not be using Krystal in any future NSFW projects.