ShaderFX is a real-time shader editor that allows you to easily create advanced viewport shaders by connecting different shading nodes. As you create your shader network, you can visualize the resulting materials interactively in viewports.
With this feature, artists and programmers can design shaders that match those of their game engine. Using your game assets and textures inside 3ds Max viewports is now made easier.
To get started, see Create a ShaderFX Shader.