VNgen uses an advanced compositing system for animating characters with multiple layers, each of which can be individually animated. But sometimes, you may notice unwanted outlines around character layers. This is due to alpha blending errors caused by antialiased edges around sprites. Unfortunately, these errors are inherent to GameMaker Studio itself and cannot be fixed by VNgen at present. However, a few workarounds are available to reduce or eliminate the effect beyond visibility.
VNgen includes two demos out of the box: a classic demo based on its predecessor, Edge VN, and a brand-new, fully voice-acted demo featuring VNgen's twin mascots, Miki and Mei. VNgen is a forward-looking visual novel and animation engine, so this demo was designed with high-quality 4K (and some even 5K) assets.
If you find some textures do not display correctly upon running the mascot demo, you must configure your project to output 4K or higher texture pages.