_O que vc quer não é net render, mas batch render, ou seja, colocar seus jobs em fila. Para isso use o recurso correto no max: Rendering menu > Batch Render
Siga conforme o help do max:
To use the Batch Render tool:
Open or create a MAX scene.
Choose Rendering menu > Batch Render.
The Batch Render dialog opens.
On the Batch Render dialog, click the Add button.
This adds your first rendering task to the batch render queue.
By default, the Camera parameter is set to Viewport, which means that the task will render the active viewport. To change to a set view, make sure the scene contains at least one camera, and then choose the camera view to render from the Camera drop-down list.
Review the Selected Batch Render Parameters settings and, if necessary, turn on Override Preset and then change the Frame Start, Frame End, Width, Height, and Pixel Aspect settings.
Click the Output Path button to set a drive location, file name and file format for the rendered image.
If you've saved any scene states with the model, you can choose which one is loaded during the rendering operation by opening the Scene State drop list.
Repeat steps 3 through 6 to continue adding rendering tasks to the batch render queue, as necessary.
When all your tasks are set, click the Render button.
_Para usar o batch com o backburner e por em fila o render via rede, a sequencia é outra:
To use the Batch Render tool with Backburner:
Before attempting to use the Batch Render tool with Backburner for network rendering, make sure the Backburner Manager is running on your managing workstation and that Backburner Server is running on all the other workstations that will receive the rendering assignments. For more information on setting up Backburner Network Rendering, refer to Network Rendering.
Set up a series of rendering tasks in the Batch Render queue as documented in the previous procedure.
Turn on Net Render and then click the Render button.
The Network Job Assignment dialog opens.
Enter a subnet mask, or, with Automatic Search off, enter the Manager name or IP address, and then click Connect.
The available rendering servers show up in the list on the right side of the Network Job Assignment dialog.
Click the Submit button to send all the Batch Render camera tasks to Backburner for network rendering to all the workstations that are running Backburner Server.
If you are running the Backburner Queue Monitor, you'll see all the camera tasks listed as rendering jobs in the Job section of the Queue Monitor.
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