Proper workflow for "unbiased" IES?

Forums: Proper workflow for "unbiased" IES?
A forum for discussion, development and support, including subforums for discussion for various plugins for octane render and 3d the relevant animation packages

Proper workflow for "unbiased" IES?

Postby studio3lhd » Fri Oct 24, 2014 8:25 am

studio3lhd Fri Oct 24, 2014 8:25 am
Can anyone shed some light on proper practices in using IES?

Where should the texture go exactly to produce realistic results? Should the IES be plugged only in the distribution? What's the proper gamma for an IES texture?
The trick is to achieve results as close to reality as possible. Anyone can tweak stuff manually, but I guess that there are "real" numbers, Octane being unbiased and all..
Octane for Modo (v 2.22.2.68), Modo (801 sp4);
2 x TITAN Black,
I7, 32GB RAM.
studio3lhd
Licensed Customer
Licensed Customer
 
Posts: 24
Joined: Thu Oct 10, 2013 1:19 pm

Re: Proper workflow for "unbiased" IES?

Postby face_off » Wed Dec 17, 2014 9:46 pm

face_off Wed Dec 17, 2014 9:46 pm
Plug the IES file into the distribution with a Grayscale Image node. Set the gamma to 1.0. Use a Spherical projection, and if you set the Coordinate Space to Normal, the light will travel in the direction of the emitter polygon normal. Octane 2.15 allows ticking Surface Brightness, which I think will calibrate the Power to 1 W/srm2.

Paul
Win7/Win10/Mavericks/Mint 17 - GTX550Ti/GT640M
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke, DAZ Studio
Pls read before submitting a support question
User avatar
face_off
Octane Plugin Developer
Octane Plugin Developer
 
Posts: 13501
Joined: Fri May 25, 2012 10:52 am
Location: Adelaide, Australia

Return to Plugin Discussion/Support


Who is online

Users browsing this forum: No registered users and 1 guest

Sat Oct 19, 2019 5:14 am [ UTC ]