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ies Light from REVIT

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rboaz

rboaz
Posted: 09 February 2012 05:32 AM

Total Posts: 35
Joined: 12 February 2009 04:17 AM

I have a linear light fixture that is using an ies file from Peerless for their linear fixture. Test scene is created in REVIT and fbx to 3dsMAx. The light source is a rectangle 1"x48". When the light is rendered it is distrubted from the center of the rectangle instead of along the entire 4’ length. See attached image

What am I doing wrong in the setup of the fixture

	Attachment

Replies: 1

You’ll need to actually look at the IES files in 3ds, make them linear. They do not import correctly at the moment.

Also since this is a direct-indirect fixture, you will need to set the fixture property so that it does not cast shadows. Check the Object properties. Else the light will not be accurate.

Author: SamuelAB

Replied: 16 February 2012 07:11 AM

Chris Medeck

Chris Medeck
Posted: 22 February 2012 09:27 AM

Location: Minneapolis, MN, USA
Total Posts: 3059
Joined: 31 October 2007 12:38 AM
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It is also a known problem that light objects set to emit from a Line or Rectangle have a tendency to have more light come from the center than the ends in mental ray. I’ve seen samples from iray and V-Ray that show it uniformly distributed, but mr is always hot in the middle.

3DS Max Design 2011 64-bit - Advantage Pack
Dell Precision T5500, Dual Six Core Xeon X5650 @ 2.67GHz, nVidia Quadro 5000, 24 GB RAM, Win 7 Enterprise 64-bit
Minneapolis, MN, USA

Replies: 0

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