Lights and Shadow Differences
(New for iC v.7.93, CC v.3.44)

iClone and Omniverse are different renderers and interpret lights and shadows differently, as shown in the following tables:

General Rules
 

iClone

Omniverse

Shadows
  • Some lights are non-occludable and don't cast shadows, i.e. IBL and point lights.
  • Shadows have adjustable intensity and can be deactivated.
  • Shadow map softness changes according to resolution.
  • All light sources are occludable and cast shadows.
  • Shadow strength are non-adjustable and can't be deactivated.
  • Shadow softeness is based on the size of the light volume.

Lights
  • Non-physical adjustment of range and decay allowed.
  • With the exception of light shapes, light sources are volumeless."
  • Light range, decay, and strength are inter-connected in a physically accurate way.
  • Light strength is influenced by physical light size.
  • With the exception of distant and dome lights, light sources have volume.
Detailed Comparison Table

iClone

Omniverse

IBL
  • Non-occludable
  • Shadowless

DomeLight
  • Occludable
  • Casts shadows

Directional
  • Shadow map softeness changes according to resolution.
  • Shadows have adjustable intensity and can be deactivated

Distant
  • Shadow softness is based on light angle.
  • Other non-physical parameters for material diffuse and specular adjustments affects the light source."

Point
  • Non-occludable
  • Shadowless
  • Volumeless
  • Non-physical adjustment of range and decay allowed

Sphere
  • Occludable
  • Casts shadows
  • Has volume

Spotlight
  • Non-physical adjustment of range and decay allowed.

Spotlight
  • Has volume
  • All lights, besides directional and dome lights, have adjustable cone angle like iClone's spot light.

LightShape
  • Point and spot light shapes can be change to tube or rectangle.
  • Has no effect on the shape and intensity of lights and shadows

LightShape
  • Shadow softness and light intensity are determined by light size.

AO
  • Screen Space
  • HBAO+ simulates ambient light diffusion

AO
  • Realtime simulates RTAO influencing objects outside of the viewing range with greater accuracy.
  • Path-traced mode does not have this adjustment parameter.

GI
  • VXGI uses voxels to calcuate light scatter with limited resolution.

Indirect
  • Raytrace simulates physcial light behavior with higher resolution and accuracy.

Glow
  • Non-occludable
  • Shadowless

Emissive
  • Occludable
  • Casts Shadows