Consistent rendering is only possible when the material models used by the various engines are similar enough. Physically-based renderers produce pretty similar

Consistent rendering is only possible when the material models used by the various engines are similar enough. Physically-based renderers produce pretty similar results for basic diffuse-metallic-clearcoat, etc. materials. Where things become hairy are more advanced effects like refraction, subsurface scattering, ambient occlusion etc., where different engines use different techniques with different tradeoffs, because there's no easy one-size-fits-all implementation. The UsdPreviewSurface part of the USD spec doesn't even support many of these advanced effects. If your scene uses these effects a lot, then consistent rendering is less likely.