This shading node does refractions at boundary and then continue the ray into a volumetric medium with single scattering until it hits the back of the surface and it’s finalized into a new direction. This model is generally applicable to materials with low indices of refraction so that their translucent nature implies that a high[…]
This node basically does multiple scattering refractions. When with romboRefract (or Standard Material) we do engage Scatter in the Refract (transmission) rollout we are doing instead volumetric single scattering. Multiple scattering is slower but more expressive. We can’t really render a resin statuette like this one below with single scattering. Let’s see its main parameters[…]
While Arnold already uses a stochastic approach for transparency, it comes only as a ‘closure’. Which means that for custom shaders that do not use an all closure approach it is not available, so we had to add one ourselves. Stochastic transparency makes a huge impact on render times where bounces depth is high. Top[…]