This is where you select the render engine to use for your render job. The default is the render engine set in your 3D application. Only Videopost (3D Studio Max) cannot be automatically recognised, and needs to be set manually.
Smartcheck / Send to Manager
Smartcheck and Send to Manager checks the scene for compatibility to the RebusFarm, ensuring an error-free render. Smartcheck is a cut-down version of Send to Manager which does the compatibility check without sending the scene to the Manager. To make things faster, Smartcheck doesn't check the textures.