This group of switches allows you to disable a number of important rendering features. By selectively disabling some features, you can get a feel for where the renderer is spending most of the time, which helps optimizing scenes. This is also useful for isolating errors and artifacts when debugging. Note that not all of these options are interactive - some of them may require the entire scene to be refreshed/exported.
Ignore all textures when rendering.
Ignore all shaders when rendering, Arnold will render with a simple "N dot eye" shader instead.
Ignore atmospheric shaders.
Ignore all light sources.
Don't perform shadow calculations.
No objects will be subdivided. This parameter is not interactive.
Displacements will be ignored. This parameter is not interactive.
Ignore bump mapping.
Polygon normals will not be smoothed, resulting in a faceted appearance. This parameter is not interactive.
Ignore motion blur. This can be useful for debugging problematic scenes with motion blur. When ignore motion blur is enabled, Arnold will use the geometry state defined by the reference_time parameter (located in the options node as well and in the range of 0-1).
Ignore Depth of Field computation.
Ignore Subsurface scattering.
Forces MtoA to export shape nodes with a shader link. This allows you to keep your shapes and shaders in separate ASS files. For example, you could have one stand-in that loads the shapes, and a second stand-in that loads the shaders. As long as the shape nodes include links to the shaders, Arnold will resolve the links and render the shapes with the right shaders.
Pepe model by Daniel M. Lara (Pepeland)