forked from bartvdbraak/blender
eacdcb2dd8
This commit adds a new model to the Sky Texture node, which is based on a method by Nishita et al. and works by basically simulating volumetric scattering in the atmosphere. By making some approximations (such as only considering single scattering), we get a fairly simple and fast simulation code that takes into account Rayleigh and Mie scattering as well as Ozone absorption. This code is used to precompute a 512x128 texture which is then looked up during render time, and is fast enough to allow real-time tweaking in the viewport. Due to the nature of the simulation, it exposes several parameters that allow for lots of flexibility in choosing the look and matching real-world conditions (such as Air/Dust/Ozone density and altitude). Additionally, the same volumetric approach can be used to compute absorption of the direct sunlight, so the model also supports adding direct sunlight. This makes it significantly easier to set up Sun+Sky illumination where the direction, intensity and color of the sun actually matches the sky. In order to support properly sampling the direct sun component, the commit also adds logic for sampling a specific area to the kernel light sampling code. This is combined with portal and background map sampling using MIS. This sampling logic works for the common case of having one Sky texture going into the Background shader, but if a custom input to the Vector node is used or if there are multiple Sky textures, it falls back to using only background map sampling (while automatically setting the resolution to 4096x2048 if auto resolution is used). More infos and preview can be found here: https://docs.google.com/document/d/1gQta0ygFWXTrl5Pmvl_nZRgUw0mWg0FJeRuNKS36m08/view Underlying model, implementation and documentation by Marco (@nacioss). Improvements, cleanup and sun sampling by @lukasstockner. Differential Revision: https://developer.blender.org/D7896 |
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| .. | ||
| bvh | ||
| closure | ||
| filter | ||
| geom | ||
| kernels | ||
| osl | ||
| shaders | ||
| split | ||
| svm | ||
| CMakeLists.txt | ||
| kernel_accumulate.h | ||
| kernel_adaptive_sampling.h | ||
| kernel_bake.h | ||
| kernel_camera.h | ||
| kernel_color.h | ||
| kernel_compat_cpu.h | ||
| kernel_compat_cuda.h | ||
| kernel_compat_opencl.h | ||
| kernel_compat_optix.h | ||
| kernel_differential.h | ||
| kernel_emission.h | ||
| kernel_film.h | ||
| kernel_globals.h | ||
| kernel_id_passes.h | ||
| kernel_jitter.h | ||
| kernel_light_background.h | ||
| kernel_light_common.h | ||
| kernel_light.h | ||
| kernel_math.h | ||
| kernel_montecarlo.h | ||
| kernel_passes.h | ||
| kernel_path_branched.h | ||
| kernel_path_common.h | ||
| kernel_path_state.h | ||
| kernel_path_subsurface.h | ||
| kernel_path_surface.h | ||
| kernel_path_volume.h | ||
| kernel_path.h | ||
| kernel_profiling.h | ||
| kernel_projection.h | ||
| kernel_queues.h | ||
| kernel_random.h | ||
| kernel_shader.h | ||
| kernel_shadow.h | ||
| kernel_subsurface.h | ||
| kernel_textures.h | ||
| kernel_types.h | ||
| kernel_volume.h | ||
| kernel_work_stealing.h | ||
| kernel_write_passes.h | ||
| kernel.h | ||