Three Gpu Pathtracing Versions Save

Fixed

• Added workaround for Windows machines to address case where the shader compilation would fail due to arrays being passed as function arguments.

Fixed

• Incorrect import statement extension.

Fixed

• Equirect sampling CDF offset values causing env maps with 1 bright pixel to be most noticeably incorrect.
• Clearcoat roughness map values not being respected.

Added

• Support for Material.flatShading to render flat-shaded materials.
• Support for randomization using Owen-scrambled and shuffled Sobol values enabling sample stratification and image in fewer samples.
• Support for directional lights, point lights.

Fixed

• Roughness and metalness maps not being assigned correctly.
• Case where textures using shared "Source" with different encodings were not treated as unique.
• Spot Lights no longer have a dark hot spot.

Changed

• Move "random" functions around.

Fixed

• Three.js semver package version.
• Removed 3 texture sampler units to add room for future features, background map.
• Texture memory leak in BlurredEnvMapGenerator.
• PathtracingSceneGenerator / DynamicPathTracingSceneGenerator: both generators now only include visible geometry in the result.

Added

• GradientEquirectTexture class for generating an equirect background texture with a gradient.
• AttributesTextureArray class for storing multiple vertex attribute buffers in a sampler array to save texture units.

Removed

• Removed FEATURE_GRADIENT_BG define and bgGradientTop, bgGradientBottom uniforms. Use the new GradientEquirectTexture class instead.
• PhysicalPathTracingMaterial: Removed normalAttribute, tangentAttribute, uvAttribute, and colorAttribute uniforms. Use attributesArray to store those parameters, instead.
• MaterialsTexture.setSide function.

Changed

• MaterialsTexture automatically uses the specified material side unless the object is transmissive - in which case double-sided is used.
• Used textures are now reduced to just those with unique sources.
• PhysicalPathTracingMaterial.uniforms.environmentRotation from a Matrix3 to a Matrix4.
• Updated three-mesh-bvh to v0.5.19.
• Rework application of Fresnel based on Joe Shutte's Disney BSDF writeup resulting in improve handling of metalness brightness.
• Use a 1.1 fresnel by default for plastics since it matches GlTF models more exactly.

New Demo Features

• Basic Setup Example
• Animation Rendering

Added

• DenoiseMaterial based on "glslSmartDenoise" to smooth the final render.
• Support for vertex colors.
• Support for attenuated transmission.
• PathTracingRenderer.alpha: Docs specifying premuliplied alpha behavior.
• Support for thin film transmission.

Fixed

• Diffuse materials looking too dark.
• Specular sampling to use perceptual roughness.
• Default specular and ior values to match three.js.

Changed

• Opacity support now requires setting material.transparent to true.

New Demo Features

• Physically Based Models
  • Cellophane Elbow Crab Demo
  • Glass Crab Demo

Added

• Support for sheen parameter support
• Support for iridescence parameter support
• Support for lights to the DynamicPathTracingGenerator
• Support for circular area lights
• Support for spot lights
• Add support for specular color and intensity control
• Support for IES Profiles on the new "PhysicalSpotLight" class
• IESLoader for loading IES profiles as textures

Changed

• PhysicalPathTracingMaterial: Default "environment intensity" from 2.0 to 1.0.

Fixed

• White hotspots at some glancing angles.

New Demo Features

• Area Light Demo
  • Circular Area Lights
• Model Viewer Models Demo
  • Add support for irradiance, sheen, specular color
• Spot Lights
  • New demo

Added

• Support for equirect rendering with EquirectCamera.
• Support for area lights.
• Support for threejs compatible texture transforms.
• Support for Clearcoat properties.
• Support for arrays of objects passed to pathtracer scene generator.

Fixed

• Black renders on M1 Safari devices.
• Camera ray direction recision issues when scrolling far from the origin.

New Demo Features

• Area Light Demo
  • New demo
• Model Viewer Models Demo
  • New demo
• Interior Scene
  • Equirect rendering support
• Material Ball demo
  • Clearcoat material property
  • Equirect rendering support

Fixed

• Textures not working correctly on Pixel 6 due to an issue with floatBitsToInt.
• PathTracingRenderer.alpha not being able to be changed after rendering.
• Improved reflective behavior for perfectly smooth surfaces.
• Case where partially transparent objects would cast full shadows.

Added

• Support for material alpha map.
• Ability to disable casting of shadows.
• Support for rendering with Orthographic cameras.
• Support for texture transform properties per texture.

New Demo Features

• Physically Based Models & Material Ball demos
  • Add option to render scene with Orthographic camera
• Material Ball demo
  • Add option to disable shadow casting per material

M2020 Rover model courtesy of NASA JPL

Fixed

• Some black artifacts when rendering with depth of field.
• DynamicPathTracingSceneGenerator.reset not correctly resetting the class resulting in errors when calling "generate" again.

Changed

• Materials to use a texture instead of uniforms to cut down on max uniform errors.
• SUPPORT_DOF no longer needs to be explicitly set and will be toggled automatically based on the bokeh size parameter.
• Removed direct support for environment blur with addition of MIS. Instead use BlurredEnvMapGenerator to preblur an environment map.
• Antialiasing jitter is now performed per ray in the shader instead of via camera position jitter for improved AA.
• GRADIENT_BG define option to FEATURE_GRADIENT_BG

Added

• Support for "matte" material flag.
• Support for Multiple Importance Sampling for the envionment map and an associated "FEATURE_MIS" flag.
• BlurredEnvMapGenerator to blur environment maps.
• Support for rendering transparent backgrounds.

Removed

• Support for gradient environment colors. Use a DataTexture, instead.

New Demo Features

• Physically Based Models & Material Ball demos
  • Add support for toggling multiple importance sampling.
  • Use EnvMapGenerator to blur the environment maps.
  • Add support for setting background alpha.
  • Add new environment map options.
  • Add floor opacity slider.
  • Add support for "matte" materials rendering as transparent.