Can a Emitter be focused?

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Can a Emitter be focused?

Postby Witpapier » Sun Aug 18, 2013 9:21 am

Witpapier Sun Aug 18, 2013 9:21 am
I Am wondering if one can create a Emiter and have it focused, like instead of spreading the light you can almost direct it as to create a laser like effect?
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Re: Can a Emitter be focused?

Postby steveps3 » Sun Aug 18, 2013 9:34 am

steveps3 Sun Aug 18, 2013 9:34 am
You can set it up as an IES light which will have the affect of focusing it.
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Re: Can a Emitter be focused?

Postby Witpapier » Sun Aug 18, 2013 11:00 am

Witpapier Sun Aug 18, 2013 11:00 am
steveps3 wrote:You can set it up as an IES light which will have the affect of focusing it.


excuse me for asking, but what does IES stand for?
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Re: Can a Emitter be focused?

Postby Erick » Sun Aug 18, 2013 6:20 pm

Erick Sun Aug 18, 2013 6:20 pm
Here's a nice free starter pack for IES lights.

http://www.mrcad.com/download-free-ies-lights/

But beware .. I almost had a meltdown, with getting/finding a right set up :lol:
Scale, distribution, orientation, power ... gwarrrrr ... not my best memories :oops: :evil: :lol: .. but once you hit it right, the outcome will/can be very! nice.
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Re: Can a Emitter be focused?

Postby face_off » Sun Aug 18, 2013 11:55 pm

face_off Sun Aug 18, 2013 11:55 pm
Pls refer to the IES section (in the Revit manual) for relevant info on this. http://render.otoy.com/manuals/Revit/?page_id=79. From memory, the actual direction of the emitter is not relevant to the direction of the IES light - use the "orientation" instead. By default (orientation - 0, 0, 0) the light points straight down.

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Re: Can a Emitter be focused?

Postby Witpapier » Mon Aug 19, 2013 3:42 pm

Witpapier Mon Aug 19, 2013 3:42 pm
Thanx all Ill look into this
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Re: Can a Emitter be focused?

Postby Pandarr » Tue Aug 20, 2013 3:43 pm

Pandarr Tue Aug 20, 2013 3:43 pm
I think Reality had some prop lights that basically used black primitives to direct the light. They looked much more fancy but if you put an emitter sphere inside a black box that had one side missing, you could reshape the box to direct the light. Works well for off-scene, but not on-scene.

Edit: These IES lights are nifty!
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Re: Can a Emitter be focused?

Postby face_off » Tue Aug 20, 2013 10:40 pm

face_off Tue Aug 20, 2013 10:40 pm
I think Reality had some prop lights that basically used black primitives to direct the light. They looked much more fancy but if you put an emitter sphere inside a black box that had one side missing, you could reshape the box to direct the light. Works well for off-scene, but not on-scene.

IES lights give a much better render result than using light boxes, so I recommend going with those.
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