This will be useful for testing and can be
enabled at compile time by setting
IBL_INTEGRATION to IBL_INTEGRATION_IMPORTANCE_SAMPLING
in *both* indirectLight.cpp and light_indirect.fs
BUGS: clearcoat and subsurface won’t
work well when this is enabled since the prefiltered
cubemap is not available and, we don’t evaluate
those lobes with importance sampling (yet).
Additionally, anisotropy can’t work with our
prefiltered importance sampling, so it still uses
the emulation by bending the normal.
this saves one multiply in the shader, but most
importantly makes the first SH coefficient a
color and reduces its range
ALL IBLs NEED TO BE REGENERATED using cmgen
* Add clear coat normal map support
This change allows to set a separate normal map for the clear coat layer of a material.
* Document the new clearCoatNormal property
* Fix typo
* Add material_testbed application
This application can be used to automatically vary material parameters over multiple frames and capture each frame as a PNG file. This makes it easier to test/compare/etc. It's also useful to generate documentation examples.
* Rename material_testbed to frame_generator
* Add new Cloth NDF
Based on the work by Estevez and Kulla, also known as the "Charlie" sheen.
* Restore DFG computation to GGX
* New proposed approximation for Cloth DFG
* Add "Charlie" cloth DFG approximation to cmgen
* Switch to "Charlie" sheen for cloth shading
* Document the new cloth NDF and DFG approximation
* Fix post-process shader when not in Vulkan
The post-process shader must not flip the source texture when we compile for OpenGL. This happens because we use SPIR-V/Vulkan as an intermediate format.
* Fix the Android build
We need to output a location when targeting SPIR-V for mobile.
* Update build instructions
* Compile shaders in a separate static library
Each shader string is now part of a separate .o file, which should make recompiling filamat/matc a tad more enjoyable.
* Shaders.h belongs to filamat, not filament
