Master Silhouette Addon is a Blender add-on from Skytails built around silhouette visualization, aimed at shape readability and composition while you animate characters or refine models. A single shortcut, Alt + X, switches between normal and silhouette mode for instant shape readability.
Beyond the toggle, the add-on lets you adjust the silhouette color, the object color, and the background color to match how you like to work. A view rotation lock keeps the viewport from turning by accident, which helps when you want to hold a single angle. A Select Collections feature filters collections in the Outliner and surfaces them from the Toolbar, giving animators quick access to character and prop collections.
It requires Blender 4.2 or above, is listed as Blender Extension compatible, and is released under the GPL license. Skytails also references a separate free version, and a demo video is available. Support is offered through the developer's channels.