Arnold for 3ds Max (MAXtoA) is the default renderer, supporting interactive rendering from the interface.
Uninstalling Arnold
You can uninstall Arnold for 3ds Max Uninstalling the program in the Programs and Features dialog from your Windows Control Panel, or using the Windows Apps feature (Windows 10). The plugin appears as MAXtoA for 3ds Max by Solid Angle.
Licensing Arnold for 3ds Max
This version of MAXtoA renders without a watermark any time you use Arnold within an interactive session of 3ds Max. However, command line and network (offline) rendering generates an image with a watermark unless a separate offline render node is licensed. You can purchase Arnold render nodes directly from Solid Angle.
Using existing Arnold licenses alongside MAXtoA
Separately purchased Arnold licenses are only consumed in situations where you need to render offline and without a watermark; for example, during command line or network rendering. Separate Arnold licenses are not consumed for rendering within a session of 3ds Max.
Upgrading legacy scenes
To convert legacy scenes and unsupported assets for use with MAXtoA, use the Scene Converter from the Rendering menu.