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Setting Display Parameters • By default, the "preferred" channel type is the value float (32-bit). • The preferred type can be changed by adding an "exrpixeltype" or "type" argument to the Display command in the RIB file. 1 # Store point positions in HALF format 2 Display "Points.exr" "openexr" "P" "string exrpixeltype" "half" 3 ri.Display("Points.exr", "openexr", "P" ,{"string exrpixeltype" :"half"}) • Compression defaults to "zip" • You can select a different compression method by adding an "exrcompression" argument or simply the "compression" argument to the Display command. 1 # Store RGBA using run-length encoding 2 Display "rle.rgba.exr" "openexr" "rgba" "string exrcompression" "rle" 3 ri.Display("rle.rgba.exr", "openexr", "rgba" ,{"string exrcompression" :"rle"}) Saturday, 23 October 2010
Search Paths • PhotoRealistic RenderMan searches specific paths for shader definitions, texture map files and Pixar Looks® masters and instances. • The search path is a colon-separated list of directories that are used in searching for files. • Example 1 Option "searchpath" "string shader" ["/mapublic/shaders"] 2 3 ri.Option("searchpath", {"string shader":"/mapublic/shaders"}) Saturday, 23 October 2010
Page 1 and 2:
Introduction to Renderman using the
Page 3 and 4:
Renderman Python • As of Version
Page 5 and 6: Hello World Renderman style • A r
Page 7 and 8: Python Version • The python scrip
Page 9 and 10: Python Path 1 #!/usr/bin/python •
Page 11 and 12: Basic Renderman commands 1 import p
Page 13 and 14: Rib layout • When writing rib fil
Page 15 and 16: Set the display options (file,displ
Page 17 and 18: Transforms 1 ##RenderMan RIB 2 #Fil
Page 19 and 20: ouping Transforms 1 ##RenderMan RIB
Page 21 and 22: Affine Transforms 1 import prman 2
Page 23 and 24: Primitives Renderman Primitives [2]
Page 25 and 26: Note Hyperboloid takes two Points a
Page 27 and 28: Parameter Lists • The parameters
Page 29 and 30: What No Cube? • PRman uses patche
Page 31 and 32: Python Cube Function • The previo
Page 33 and 34: Python Dictionaries • Python dict
Page 35 and 36: Adding Colour • To change the col
Page 37 and 38: Attributes 1 WorldBegin 2 Translate
Page 39 and 40: 1 Preamble and global variable decl
Page 41 and 42: Attributes • Attributes are flags
Page 43 and 44: Shading Rate • This is probably t
Page 45 and 46: Shading Rate III • As long as the
Page 47 and 48: Objects • A single geometric prim
Page 49 and 50: Named Primitives • It is occasion
Page 51 and 52: 1 ri = prman.Ri() # create an insta
Page 53 and 54: Frame Buffer Control • There are
Page 55: OpenEXR Driver • This display dri
Page 59 and 60: ReadArchive • The ReadArchive com
Page 61 and 62: Procedural Geometry • The torus w
Page 63 and 64: Exercise • Try to build this Scen
Page 65: References • [1] Ian Stephenson.
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