Fluid Rig is a comprehensive Roblox character rig designed specifically for animation and rendering within Blender. It features a package switching system that allows users to independently change body parts across five different built-in options. The system can seamlessly toggle between standard R6 and R15 rig types and includes inverse kinematics (IK) controls for both arms and legs.

Animators can customize their characters using either the included 2D or 3D face rigs. A dedicated user interface panel provides access to material settings, such as glossiness toggles, alongside tooltips for various animation controls. The product includes standalone character rig files, a pre-built pose library, and optimized "lite" versions. The rig supports limb bending up to 120 degrees.