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Tjeerd_89

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Posts: 1
Reply with quote  #1 

Hi guys, newbie here. 

Bought Podium a week ago and im in development right now of learning it.

I wanted to create a surface that emits light. To do this I gave a surface a color and in Material Properties, I gave it LEM light power of about 20.

 

Now this seems to work when the panel is facing in the viewers direction. The surface lights up and so does the surrounding. 

But..

If you look from a other angle, so you dont see the LEM surface, then it does not seem to emit light since I dont see any reflections in that scenario.

Is this normal ? Does the LEM only work if the surface is faced to the camera/viewer?

I did not change any speccs between the 2 images, only the viewing point.

ando 2017-11-26 16434100000.png  ando 2017-11-26 16360000000.png 


drawovis

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Posts: 47
Reply with quote  #2 
I think you got the LEM on the backside of your surface.
Go to View, face Style, monochrome. Look if the side where to LEM is light or dark-gray
Knipsel.jpg 
If it's darkgrey, you painted on the backside. Remove the material, reverse the face and paint the LEM on the light side.
Then you should have solved your problem.

jlo

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Posts: 106
Reply with quote  #3 
to add a little bit - most people put the LEM behind the camera as a flash for the camera or outside windows to bring more hidden light into a space. It can also be marked as invisible to podium but still cast out light so no you don't need to be looking at the lem for it to work. 
Katie

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Reply with quote  #4 
Does the camera have to be used to show the material added with LEM applied? 

I applied a material to a small model applying a Hidden LEM to the floor, when I render the scene the floor appears white... where did the material go? 

Can someone explain the correct way to use LEM please, thanks. [smile]

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K A Foley
bigstick

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Posts: 10,334
Reply with quote  #5 
LEMs simulate light sources. They shouldn't be used as physical materials.

For example they can simulate bounced natural light, or they can be used in light bulbs. You shouldn't make the actual bulb material/geometry emit light.

The only reason you would want to apply an LEM to a floor is if you want to simulate something like an illuminated dance floor. For that you would use a transparent panel with an LEM behind it.



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