Atrc

Offline rendering lab based on ray tracing

Note. GPU version is in development...

Features

• Volumetric path tracing with next event estimation
• Volumetric particle tracing
• Volumetric bidirectional path tracing
• Stochastic progressive photon mapping
• Primary sample space MLT on path tracing
• ReSTIR renderer
• Various material models: Disney principled BSDF, phong, DreamWorks fabric ...
• Homogeneous/heterogeneous participating medium
• Normalized diffusion BSSRDF
• Almost all material properties can be specified with 2D/3D textures
• Various geometry models: sphere, quad, triangle, disk, mesh
• Two-level accelerating structure (SAH based BVH)
• Importance sampled environment light
• G-buffer output (albedo, normal, ...)
• Depth of field
• ACES tone mapping
• Image sample space low-pass filter
• (Optional) Integrated OIDN library
• (Optional) Integrated Embree library
• Interactive scene editor

Known Issues

• Relation between inv gamma correction & linear sampler of image texture

Documentation

doc

Gallery

Editor:

Food (rendered with bdpt) (scene ref here):

Juice (rendered with vol_bdpt) (scene ref here):

Classroom (rendered with vol_bdpt) (scene ref here):

Materials: (rendered with pt):

Fog (rendered with vol_bdpt):

BSSRDF (rendered with pt):

Bedroom (rendered with pt) (scene ref here):

Dining Room (rendered with bdpt) (scene ref here):