Scanning laser - How to?


#1

What’s the best way to create a scanning laser (like that at the beginning of Aliens or like a barcode reader). So the laser would be a spread out plane (not a beam) that would highlight a line on the surface it hits. Possibly also be able to render volumetric scattering.

TIA


#2

I know you ca ngive a rectangle (even a thin one) shape to spot light (check the about spotlight). Give more intensity. The good rig would be made of several lights. I would use four. The spotlight I describe first. To littler spots with circle shapes at each border of the scanning light with a more intensity. And the last one is duplicated from the first (an thin rectanlge) with volume effect and really less intensity. You could even create a plane with animated alpha noise to simulate volume light.

  • Nico

#3

You got it ?


#4

Sorry, not had time yet, will give it a try on Sunday most likely!

Thanks for the reply. Will let you know how it works out…

Thanks!


#5

Hey, I just tried it out. Did you mean the barn doors on the spotlight? It works ok and seems to do what I want.
I assume if I want to add the volumelight plane, it would have to track the light plane in an animation?

I tired to use parti_volume (mental ray) but the mental ray lights don’t support barn doors, do they?

Anyhows… thanks again…


#6

I assume if I want to add the volumelight plane, it would have to track the light plane in an animation?[QUOTE]
Yeah, create a little paretning rig to animate your lazer.

[QUOTE] I tired to use parti_volume (mental ray) but the mental ray lights don’t support barn doors, do they?

Can’t help you about Mental Ray features.

I don’t know waht barn doors are? Is that the doors of a farm building ?


#7

In the spot light attributes, there’s a feature called “barn doors” (which are doors for a farm building) which allow you to make the spotlight beam narrow vertically and/or horizontally.

I assume that’s the feature you were talking about?


#8

No, I was not talking about darn doors features (I think it comes from MR). My method does not required any special renderer stuffs.


#9

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