This is a tutorial I put together 2 years ago after I quit working at Rescreatu. The original forum post, along with more tips for virtual pet drawing and an extensive FAQ, can be found here on the website. I realized that there are probably plenty of people who might benefit from this that aren't on Rescreatu, so I've compiled it into one easy-reference image! Keep in mind that this only teaches the standard site style for Rescreatu, please refer to [this tutorial] for something more up-to-date on how I do my current renderings.
Want a better look at how this file is set up? [Download the PSD]