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• Arnold GPU supports complex shading networks, SSS, hair, atmospherics, instancing, and procedurals.

• With the same settings, GPU renders will currently be noisier than CPU renders since GPU renders are "non-splitting" (i.e. one path per camera/AA sample). Accordingly, to achieve equivalent noise the AA sample count will need to be increased in GPU renders. Adaptive rendering is fully supported.

• standard_surface, standard_hair, and standard_volume are supported, with some limitations (see the table below).
• OSL is supported, with some limitations currently (see below).
• OpenVDB volumes are supported, with some limitations currently (see below).
• Volume displacement is supported, with some limitations currently (see below).
• Floating-point textures are converted to half-float. Filename attribute tags are supported. Mipmap bias is not supported.
• Light linking is not supported.

• Limited AOV support.

• Light groups, shadow groups, trace sets are not supported.
• Custom procedurals, drivers, color managers are supported.
• Custom shaders, cameras, filters, BSDFs are not supported.
• Noice is not supported with Arnold GPU renders (because the variance filter is not supported on Arnold GPU)
  
  

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