New Features

• PhotonGI cache
• Added ALBEDO AOV
• Added to BiDir the support for shading normal, geometry normal, position, material ID, UV, object ID, material ID color and Albedo AOVs
• Added AVG_SHADING_NORMAL AOV
• Integrated Intel Open Image Denoiser (Oidn)

''Alpha0 released''

• Added a new way to blend brute force path tracing and cache in PhotonGI. Cache is now used more often on glossy surfaces
• Introduced a new PhotonGI debug mode to show the mix between brute force and cached paths
• Added the support for automatic PhotonGI indirect cache best radius estimation
• Added the support for automatic PhotonGI indirect cache size by using convergence error estimation
• Front and back material transparency (aka light invisible object)
• Added PhotonGI support for volumes cache entries
• LXS parser now supports instance definitions
• Added the support for new "directx2opengl_normalmap" image map channel selection
• Added new textures: Power, Less Than, Greater Than, Dot Product, Position, Shading Normal

''Alpha1 released''

• Saving/resuming the rendering now includes all PhotonGI cache information and entries
• Added the support for new shape "group"
• Added the support for nested groups to LXS parser
• Added the support for persistent PhotonGI cache on file
• Added the support for using persistent PhotonGI cache across multiple frames for fly-through animations
• DLSC now automatically estimated the best radius if lightstrategy.entry.radius is set to 0.0
• New improved Random/Sobol sampler adaptive code
• LXS parser now supports halttime and haltspp film halt conditions
• LXS parser now supports volumes
• Shadow catcher is now easier to use with multiple light sources of any type

''Beta1 released''

• Added the support for tiled denoising to save a huge amount of ram
• Added the support for new visibility map cache for infinitelight, constantinfinite and sky2 light sources
• Added the support for new Disney BRDF material from Siggraph 2012 paper
• Upgraded Intel Oidn to v0.9.0
• Metal material uses a more accurate Albedo value (for Intel OIDN)
• Added "rounding" texture
• Added "modulo" texture
• Improved tiling feature of OIDN imagepipeline plugin
• Fix a bug in ToProperties code of "blender blend" texture when "halo" progression type was used

''Beta2 released''

• Added the support for periodic PhotonGI caustic cache update (aka SPPM without radius reduction)
• PathTracer class now support eye and light path tracing. LIGHTCPU now uses PathTracer class too.
• Added Hybrid Back/Forward path tracing support
• Added the support for glossy caustics rendering to Hybrid Back/Forward
• Reworked the support for new visibility map cache for infinitelight, constantinfinite and sky2 light sources
• Transparent light sources are now rendered with the correct intensity
• New env. visibility map cache now supports persistent cache on file

''Beta3 released''

• Improved shading with interpolated normals
• Added the support for Shadow Terminator avoidance factor when using bump mapping
• Upgraded Intel Oidn to v1.0
• Reworked Direct Light Sampling Cache
• Direct Light Sampling Cache now supports persistent cache on file

''Beta4 released''

''RC1 released''

• Disney material glossiness is now computed as the square root of the previous value to match Glossy2/Metal roughness

Fixed Bugs

• Fixed rendering resume feature

''Alpha0 released''

• Fixed a problem with infinite lights and BiDir or PhotonGI
• Fixed a bug when using radiance groups with variance clamping and OpenCL
• Fixed camera invisible objects usage with volumes
• Fixed TASK_EMIT of LightStrategyPower
• Fixed a crash when using RTPATHOCL and editing area lights (issue#173)
• Fixed a bug when using radiance groups with variance clamping and OpenCL

''Alpha1 released''

• Fixed a crash when using negative material emission values (issue#177)
• Fixed LXS parsing in pyluxcoretools
• Fixed a problem when mixing transparent and solid materials with Mix (issue#183)
• Fix a bug when using glossy coating with any specular material
• Fixed LXS parsing of point light source position
• Fixed object ID not being saved by FILESAVER engine
• Fixed a major bug in carpaint material (issue#186)
• Fixed spelling mistake in cloth material "wool gabardine" preset
• Fixed Scene::RemoveUnusedMeshes()
• Fixed a bug in Mix material when working with specular materials (issue#187)
• Fixed an overflow problem when using an heterogenous volume on very large segments
• Sun relative size has now a lower bound of 1.0 to avoid numerical precision problems
• Fixed a problem with Scene::ToProperties() after editing a scene
• Fixed a self-shadow problem with area light sources

''Beta1 released''

• Fix ToProperties() of mapspherelight and spherelight
• Fixed a problem with caustic cache size when both PhotonGI caches were
  enabled and automatic stop condition for indirect cache was used
• PhotonGI Metropolis will now focus on caustic cache when indirect is done (and vice versa)
• Fixed the access to an uninitialized variable when using PhotonGI caustic cache alone
• Fixed the access to an uninitialized variable in ProjectionLight::Preprocess()
• Fixed a crash when trying to render a scene without light sources with PATHOCL (issue#202)
• Fixed DLSC to work with Front and back material transparency (aka light invisible object)
• Fixed a problem in BIDIRCPU with camera PDF
• Fixed a bug in Mix material transparency support (issue#210)
• Added a workaround to an AMD OpenCL compiler bug in DirectLight_BSDFSampling()

''Beta2 released''

• Fixed a problem in the random number generator of PhotonGI
• Fixed wrong theta being saved in ToProperties() of distant light
• Fixed a compilation error in RoughMatte OpenCL code (issue#218)
• Fixed a problem with Disney material specular tint
• Fixed a TILEPATH bug causing black renderings
• Fixed BIDIRCPU and LIGHTCPU camera motion blur
• Fixed a bug related to initial camera volume in PATHOCL
• Fixed light tracing camera motion blur and arbitrary clipping plane support
• Fixed a bug in the OpenCL code of the splitfloat3 texture
• Fixed normal mapping
• Fixed a problem when saving ALBEDO AOV
• Fixed RoughGlass event types returned by material evaluation
• Evaluated best radius in PhotonGI, ELVC and DLSC is not affected any more by border rendering
• Fixed a crash when resuming scene rendering without PhotonGI enabled
• Fixed a NaNs problem when using area lights with zero area
• Fixed the export of material emission.directlightsampling.type property

''Beta3 released''

• Solved a self-shadow problem on edges with interpolated normals
• UV scale doesn't affect anymore bump map strength
• Fixed an out of bound memory access in automatic lookup radius code
• Fixed a problem with Disney material, hybrid backward/forward path tracing and low roughness values
• Fixed bump mapping black halo for large scale values

''Beta4 released''

• Fixed the allocation of light tracing sampler shared data in hybrid backward/forward path tracing
• Fixed a problem when using flat instances and OpenCL rendering
• Fixed/Enabled PhotonGI cache on Mix and GlossyCoatting materials when possible
• Fixed a regression in BIDIRCPU causing dark edges on glancing surfaces
• Fixed a crash when PhotonGI caustic cache is enabled but empty (issue#236)

''RC1 released''

• Removed a workaround for Glossy roughness values < sqrt(.0001) for AMD OpenCL driver
• Fixed the shift of one pixel on light tracing pass of LIGHTCPU, BIDIRCPU and Hybrid Path (issue#237)
• Fixed a crash when re-defining light source (from constantinfinite to infinite) (issue#238)
• Fixed pyluxcoretool CLI not working without pyside (issue#131)
• Fixed a problem with the fix of the issue#237 (issue#239)

Checkhttps://wiki.luxcorerender.org/LuxCoreRender_Release_Notes for the full list
of release notes.

Note for Windows users: you have to install theMicrosoft Visual C++ Redistributable
for Visual Studio 2017.