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In this tutorial, we will use XGen to create a complex scene with more than 50 thousand instances of a primitive that itself has over 100 thousand triangles. The final scene has a total of 3 billion visible triangles, and it will render using only 1.2 GB of memory. 

The scene can be downloaded here.

 

1 - Primitive Archive

Start off by loading the geometry that you want to use as the XGen archive. We will adjust its dimensions later with the XGen Size attribute. You can apply any initial shaders to the model as you will be able to modify them later. Before exporting the archive, to be sure that it is exported to the Arnold format, e.g. the MtoA plugin should be loaded. You should also open the Arnold Render Settings to initialize MtoA settings for the scene. Save the scene before proceeding.

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