====== Basic Render Setting ======

  * **Base material**: Redshift Material (comes with preset)
    * reflection:
      * roughness: (spec blurness)
      * fresnel type: IOR - index of reflection
    * refraction, transmission
      * weight: (transparency)
    * Optimization
      * reflection: max trace depth

  * RS surface scatter mat
    * scale: smaller mean less scatter

  * **Light**
    * RS_domelight (HDRI light)
    * RS_physicalLight (area light, geo light, spot light, point light)

  * **Camera**'s lens shader
    * Bokeh shader: 
      * Ciricle of Confusion: smaller, sharper
      * bokeh shape image: control bokeh shape and if RGB seperate, it will add abbreviation
    * PhotographicExposure shader

**Render setting**

^ Output tab ^^
^ Progressive Rendering |
| the passes setting | only affect IPR progressive render, not final render |
| Force Progressive for IPR | uncheck that if you want to bucket render for IPR as point based render not supported in progressive |
| unified sampling and adaptive threshold | noise level control \\ min > 4 \\ randomize pattern for each frame: good for animation to random noise |
^ sample filter | blur or sharp image, like those JPG engine |
^ sample override | override per property sampling, good for check what need improve noise |
^ motion blur | deforming geo needs check enable Deform blur |
| transform step | (sample steps for motion analysis per frame) |
| frame duration | (time duration for blurriness, for animation, normally 1 frame) |
^ Gamma | gamma 2.2, linear workflow |
| color management | RenderView > option : color manager, sRGB,SRG, no maya color control | 
^ Environment | RS_environment, or RS_Sky |
| atmopshere | fog: volumeScattering |
^ Tone Mapping | allowed overexp: highlight recovery; \\ black crush: contrast adder |
^ Photometric units | units to meter scale for calculation; cd/m2 factor: non-physical light intensity mulplier |
^ AOV tab ^^
| depth | distance info for DOF or Fog |
^ Option tab ^^
| max trace depth | max bounce or pass-through for ray calculation |
^ GI tab ^^
| primary GI | first light Bounce |
| secondary GI | second and later light Bounce |
| number GI bounce | for interior, maybe need more like 10 |
| brute force | more ray will clean up image |
| radiance point cloud | smaller screen radius means better performance, \\ |
^ Photon mapping tab ^^
| photon GI and caustics |
^ SSS tab ^^
| point based |
^ system tab ^^
| feedback display | display window with all render info |
| material override | light check with basic material |
| bucket rendering setting | size, and order |

  * **Render Proxy**
    * RS_menu > export

  * **Utility shader**
    * material
      * RS_matteShadowCatcher
      * RS_MaterialBlender

  * tutorial:
    * https://www.youtube.com/watch?v=c3RUBEPhQOs
    * https://www.youtube.com/watch?v=ChvPeRdC8T8
====== Extra Resource ======

  * [[http://www.hdrlabs.com/sibl/archive/|HDRI test file]]