todo.txt

x make work multi-platform: on mac, linux and windows
x allow user to select mitsuba binary
x make it possible to persist render settings
x integrate plugins, shaders into python package
x get result of call
x print output from render
x replace os.system with process class
x allow user to retain intermediate files (.obj, .xml)
x force objexport to load

x support animatable, rotating environment maps
x support animated textures
x support area lights
x fix compute method for all materials - if plug == sunsky.mOutColor

x branch git repo
x rename windows_64 to plug-ins
x remove materials.py, render.py, scriptEditor.py, tempo.py, test.mel, test2.py, champagne.ma

x support colored area lights
x change render working directory to output image directory. keep only one log.

x support general cameras, not just camera, aim, up combinations

x move materials into 'materials'
x add __init__.py as appropriate
x support batch / animated renders

x hookup verbose render setting

x remove dependence on UI to drive render parameters
x add support for persisting render settings
 x filters
 x samplers
 x integrators - Path Tracer
 x The rest of the integrators

x add support for more light types - point, spot
x add support for more sensor types
 x orthographic

x centralize / standardize xml writing

x add support for more sensor types
 x spherical, telecentric, radiancemeter, fluencemeter, perspective_rdist

x add support for more film types
 x hdr, ldr, tiled, math

x add support for meta-integrators
 x adaptive, irrcache

x add support for multi-channel rendering, with supported integrators
 x ao, direct, path, volpath, volpath_simple, and irrcache.

x add support for meta-integrator parameters
 x adaptive, irrcache

x add support for film parameters

x support animated parameters in batch mode
 x added MAYA_RELEASE_PYTHON_GIL = 1 to Maya.env

x expand support for predefined 'conductor' materials
x clean up materials
 x diffuse, roughdiffuse, 
 x dielectric, thindielectric, roughdielectric
 x conductor, roughconductor, 
 x plastic, roughplastic
 x phong, ward
 x diffuse transmitter
 x irawan
 x twosided
 x coating
 x roughcoating
 x mixturebsdf
 x blendbsdf
 x mask
 x bump
 x hk - uses phase functions
 x dipole
 x homogeneous
 x heterogeneous

x Support all surface scattering models
x Support all subsurface scattering models
x Support combination of surface and medium scattering models

x make plugin ids consistent

x indent code to 4 space tabs

x replace all mel functions with automatically generated mel which immediately calls back into Python

fixes based to use:
x eliminate duplicate geometry export
x replace illegal characters in exported geometry file names
x fixed broken texture element creation
x made all geometry references use the full dag path name

x respect visibility of lights
x handle object visibility better, i.e. look at visibility of parents
x fixed dipole sigma A, S, T and Albedo export types
x made light irradiance values linear (rgb, instead of srgb)

x add support for crop coordinates (pulled from general render settings or render view selection rectangle)

x add support for block size (-b), partial image output (-r) and thread count (-p) command line parameters
x show partially complete images

x use pre-generated mip-maps if they exist
 x already handled by mitsuba

x make sure render logs are printed as render happens, i.e. don't block

x simplify IO code with wrapper functions and classes

example scenes for materials
 x diffuse, roughdiffuse, 
 x dielectric, / thindielectric, roughdielectric
 x conductor, roughconductor, 
 x plastic, roughplastic
 x phong, ward
 x diffuse transmitter
 / irawan
 x twosided
 x coating, roughcoating
 x mixturebsdf
 x blendbsdf
 mask
 bump
 x hk - uses phase functions
 x dipole
 x homogeneous
 heterogeneous

add support for ensureEnergyConservation boolean on BSDFs
	http://www.mitsuba-renderer.org/api/classmitsuba_1_1_b_s_d_f.html

/ allow dipole sss to be used in mixture and blended bsdfs

support render cancel
support batch render cancel
support interactive render view / update / cancel

create renderData/mitsuba directory for temporary render files


figure out if you can load multichannel exrs into the Maya Render View
add support for metadata and label annotations with ldrfilm and hdrfilm
standardize callbacks used in UI

organize UI
- connect activation of multichannel and metaintegrators to choice of base integrator

add support for writing lightmaps using irradiancemeter sensor type
- need workflow design

replace xml writing with etree




Notes / references


http://knowledge.autodesk.com/support/maya/troubleshooting/caas/sfdcarticles/sfdcarticles/Registering-a-custom-renderer-for-batch-rendering.html

http://help.autodesk.com/view/MAYAUL/2016/ENU/

https://github.com/haggi/OpenMaya/blob/master/src/common/python/Renderer/__init__.py


Location to copy .mod and .xml files
- Is there a better place, i.e. in /Users/Shared/Autodesk/.... ?
/Applications/Autodesk/maya2016/Maya.app/Contents/modules/
/Applications/Autodesk/maya2016/Maya.app/Contents/bin/rendererDesc/


Notes on usage
- Energyredistributionpathtracing, maxChains is noted as a float attribute in the documentation but the implementation expects an integer
- Energyredistributionpathtracing seems to render, with continuous "Unable to recreate specular vertex in perturbation" errors
- Progressive Photon Map crashes
- The roughdiffuse bsdf alpha parameter is described as a 'spectrum or texture' but plugin expects a float
- What material does the 'Bk7' IOR correspond to?
- Kajia-Kay phase function produces NaNs when used with the HK surface shader
- Energy conservation check seem to be for values >= to 1 rather than > 1
- "violates energy conservation! The parameter "opacity" has a component-wise maximum of 1 (which is > 1!) and will therefore be scaled by 0.99 to prevent issues. Specify the parameter ensureEnergyConservation=false to the BSDF to prevent this from happening.
"