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Photon tracing | Maya 2016 | Autodesk Knowledge Network
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-2A05BF61-2A60-4CE8-8F54-43E362C06982-htm.html
Set scene-wide photon tracing overrides | Maya | Autodesk …
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/Maya/files/GUID-7ECE4F99-D6F1-4763-80C0-06CF9BAE26DE-htm.html
Global illumination overrides and Caustics overrides let you turn on or off the photon casting or receiving capabilities of all objects in your scene at once (with the exception of any flags you’ve set on a per-object basis, see Flag objects to cast and receive photons). You can further define the look of your scene and reduce the rendering load (especially good for test renders) by defining ...
Photon maps and photon tracing | Maya 2016 | Autodesk …
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-49FA96E4-2D0A-41AC-A968-5A0290CD30FD-htm.html
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Photon tracing - Autodesk
https://download.autodesk.com/global/docs/maya2014/en_us/files/mrfm_Lighting_Photon_tracing.htm
Photon tracing creates a photon map (see Photon maps ), which is used by mental ray for Maya to render global illumination and caustics. Photons work as follows: Light sources can emit photons (packets of energy). See Turn on photon emission for a light source . Photons bounce around in the scene until the Max Photon Depth is met.
Troubleshoot photon tracing limitations | Maya 2016 | Autodesk ...
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-5FB10E65-654D-4437-8906-B28163B3263D-htm.html
Shadows During photon tracing, shadow shaders are not processed. This prevents light sources from casting shadows on objects twice (once through the shadow shader and once via transmitted photons), resulting in incorrect illumination. Additionally, photons cannot mimic some Maya features such as a depth limit on shadow rays
Set scene-wide photon tracing overrides | Maya 2016 | Autodesk ...
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-7ECE4F99-D6F1-4763-80C0-06CF9BAE26DE-htm.html
Global illumination overrides and Caustics overrides let you turn on or off the photon casting or receiving capabilities of all objects in your scene at once (with the exception of any flags you’ve set on a per-object basis, see Flag objects to cast and receive photons). You can further define the look of your scene and reduce the rendering load (especially good for test renders) by defining ...
Troubleshoot photon tracing | Maya 2016 | Autodesk Knowledge …
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-21F81DEC-7C93-4ED1-AA55-FC8E1FE3A53E-htm.html
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Turn on photon emission for a light source | Maya - Autodesk
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/Maya/files/GUID-2E6C62EA-BBBA-4F11-A6C8-4CE1A4A47CE1-htm.html
To turn on photon tracing Select the light source you want to emit photons. For example, spot light. (See also Direct light sources.) Open the Attribute Editor(+a). Select the light’s shape tab. Set Decay RatetoQuadratic. This causes light levels in the scene to decrease in intensity based on the inverse square law (naturally).
Photon maps | Maya 2016 | Autodesk Knowledge Network
https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Maya/files/GUID-09209F68-D0A8-49B8-8057-47DA5B247462-htm.html
Photon maps are: Required to produce global illumination and caustic effects. (They are not required for Final Gather.) A 3D representation of the accumulated light energy at certain photon bounce points. Conceptually similar to shadow maps, but they capture light instead. Created during the Photon tracing stage.
フォトン トレーシング - Autodesk
https://download.autodesk.com/global/docs/maya2013/ja_jp/files/mrfm_Lighting_Photon_tracing.htm
フォトンをトレースするとフォトン マップが作成され(フォトン マップ を参照)、グローバル イルミネーションとコースティクスをレンダーするために mental ray for Maya によって使用されます。フォトンの動作は次のとおりです。 光源はフォトンを放出できます(エネルギーのパケット)。
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