Developer Preview 06

Changes

Rendering

• added random walk subsurface scattering
• changed thin film material tracing logic
• added translucent (diffuse transmission) material
• medium sampling improved
• old an unused materials removed

General changes

• changes to material definition
• overall UI updates and fixes
• material editor greatly improved

Code

• experimental macOS support
• code also compiled with clang on Windows
• old and unused code removed

Developer Preview 05.1

Changes

• subsurface scattering in VCM integrator;
• faster (multithreaded) spatial grid generation in VCM;
• optional support of OpenVDB removed;
• NanoVDB support is now enabled by default ;
• release include binary to convert vbd -> nvdb;
• a lot of code refactoring;
• Embee upgraded to version 4;
• new wavefront CPU path tracer.

Developer Preview 05

Changes

• velvet BRDF;
• subsurface scattering (Christensen-Burley, only available in CPU path tracing integrator);
• all conductor and dielectric are now multi-scattering only;
• all GPU integrators are temporarily disabled;
• RIS sampling in direct lighting integrator (experimental state);
• materials and mediums editing, emitters editing, camera options;
• saving modified scene now available;
• deprecated and unused BRDFs removed;

Developer Preview 04

Changes

• Vertex Connection and Merging integrator working on GPU (super slow, and super long to compile);
• OptiX denoiser could be used on GPU Path Tracer;
• pure CUDA functions now supported (without OptiX);
• various fixes for materials (mixture BRDF works on GPU);
• more test assets included.

Developer Preview 03

Changes

• GPU rendering with OptiX (unidirectional path tracing only now);
• complex Fresnel coefficients (general form);
• thin film rendering on top of all materials (with reflections);
• performance improvements;
• more samples added to assets;
• atmosphere integrator (produces sky environment images).

Developer Preview 02

Changes:

• added Bidirectional integrator;
• added VCM integrator;
• added multiscattering materials;
• added ability to save tonemapped image;
• fixes and improvements in UI and workflow.

Developer Preview 01

The very a first developer preview or etx-tracer:

• basic UI and controls;
• is possible to open .obj files, but materials (.mtl file) have to be adjusted (by default all materials will be diffuse);
• package includes sample scenes (json files), but exact scene format is still to be designed;
• only CPU path tracing is included into this release.