Alpenshiva Posted August 28, 2013 Share Posted August 28, 2013 Hello everyone! I would like to know how you handle linear lights like LED-Strips or fluorescent tubes in combination with IES files. There are some producers which offer files for tubes, but they all look similar to a point light. Is there a possibility to manage this without using vray area lights? Thank you, Alpenshiva Link to comment Share on other sites More sharing options...
Chris MacDonald Posted August 28, 2013 Share Posted August 28, 2013 (edited) I would imagine that would be very computationally expensive, but I suppose if I were to do it then I'd draw a spline along where the LED strip would be and use the spacing tool to place IES lights along it at set intervals. As for strip lights, I really don't see any problem with using a long VRay Plane Light, or even a VRay MeshLight to simulate the shape. Edited August 28, 2013 by Macker Link to comment Share on other sites More sharing options...
Alpenshiva Posted August 28, 2013 Author Share Posted August 28, 2013 Thank you, so actually it´s like a work around in case of physically correct illumination. This means it´s not possible to use IES for linear light objects and tell the client to be a correct illumination. Link to comment Share on other sites More sharing options...
Chris MacDonald Posted August 28, 2013 Share Posted August 28, 2013 Well yes and no. LED strip lights are made of anything from 1 to hundreds of individual LED lights, so no manufacturer will ever be able to know how you are going to use it in your project and provide you with an IES for it; there are literally infinite possibilities. The only way you will get a physically correct version of it is to find an IES for a single LED light and array that around, thus simulating an LED strip. This would get you pretty damn close to the real thing, as close as you'll ever need to get I'd imagine. Link to comment Share on other sites More sharing options...
John Dollus Posted August 28, 2013 Share Posted August 28, 2013 not in max, not really. Mental ray also has a problem with this type of light. they have to interpolate the distribution along a vector which ends up being 'close' but not correct. For correct illumination, you should really use lighting design software and not graphics programs. Link to comment Share on other sites More sharing options...
Ismael Posted August 28, 2013 Share Posted August 28, 2013 Or you can use the IES, http://lightingsolutions.honeywell.com/downloads.html 'Correct illumination' is a number on an illumination standard: http://www.engineeringtoolbox.com/light-level-rooms-d_708.html A physically based visual representation (rendering) of that given illumination, that is an art. Link to comment Share on other sites More sharing options...
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