diff options
| author | Sebastian Herhoz <sebastian.herholz@intel.com> | 2022-09-21 18:58:34 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brecht@blender.org> | 2022-09-27 16:56:32 +0300 |
| commit | 75a6d3abf75f3082adf5240ae34973844c0d9a09 (patch) | |
| tree | 6967aea2480187db007cdc003bad14fbb372570d /intern/cycles/device/device.h | |
| parent | 6d19da0b2d468f099e0c1f56392ab8a1750d114f (diff) | |
Cycles: add Path Guiding on CPU through Intel OpenPGL
This adds path guiding features into Cycles by integrating Intel's Open Path
Guiding Library. It can be enabled in the Sampling > Path Guiding panel in the
render properties.
This feature helps reduce noise in scenes where finding a path to light is
difficult for regular path tracing.
The current implementation supports guiding directional sampling decisions on
surfaces, when the material contains a least one diffuse component, and in
volumes with isotropic and anisotropic Henyey-Greenstein phase functions.
On surfaces, the guided sampling decision is proportional to the product of
the incident radiance and the normal-oriented cosine lobe and in volumes it
is proportional to the product of the incident radiance and the phase function.
The incident radiance field of a scene is learned and updated during rendering
after each per-frame rendering iteration/progression.
At the moment, path guiding is only supported by the CPU backend. Support for
GPU backends will be added in future versions of OpenPGL.
Ref T92571
Differential Revision: https://developer.blender.org/D15286
Diffstat (limited to 'intern/cycles/device/device.h')
| -rw-r--r-- | intern/cycles/device/device.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/intern/cycles/device/device.h b/intern/cycles/device/device.h index cdb13ca0a97..2e4d18241cf 100644 --- a/intern/cycles/device/device.h +++ b/intern/cycles/device/device.h @@ -66,6 +66,7 @@ class DeviceInfo { bool display_device; /* GPU is used as a display device. */ bool has_nanovdb; /* Support NanoVDB volumes. */ bool has_osl; /* Support Open Shading Language. */ + bool has_guiding; /* Support path guiding. */ bool has_profiling; /* Supports runtime collection of profiling info. */ bool has_peer_memory; /* GPU has P2P access to memory of another GPU. */ bool has_gpu_queue; /* Device supports GPU queue. */ @@ -84,6 +85,7 @@ class DeviceInfo { display_device = false; has_nanovdb = false; has_osl = false; + has_guiding = false; has_profiling = false; has_peer_memory = false; has_gpu_queue = false; @@ -217,6 +219,15 @@ class Device { return false; } + /* Guiding */ + + /* Returns path guiding device handle. */ + virtual void *get_guiding_device() const + { + LOG(ERROR) << "Request guiding field from a device which does not support it."; + return nullptr; + } + /* Buffer denoising. */ /* Returns true if task is fully handled. */ |