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[Help Needed] Batman spotlight on clouds.

Jul 7, 2011, 15:18
Post: #1
Question [Help Needed] Batman spotlight on clouds.
Hey guy's, I'm trying to get that batman spotlight effect. I want to have it look like I am projecting my text onto clouds. I kinda have decent looking clouds, but I'm wondering if you guys have any ideas on how to make it look like I'm really lighting up the clouds with a spotlight.
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Jul 7, 2011, 17:54
Post: #2
RE: [Help Needed] Batman spotlight on clouds.
Blur the batlogo a bit, and put that layer in screen or overlay mode. In addition you can also try to use your clouds as a bump map for the logo.

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Jul 7, 2011, 18:11
Post: #3
RE: [Help Needed] Batman spotlight on clouds.
(Jul 7, 2011 17:54)ofnuts Wrote:  Blur the batlogo a bit, and put that layer in screen or overlay mode. In addition you can also try to use your clouds as a bump map for the logo.

I blurred the logo a bit, looks good, is there any way to make my beam of light look more realistic? Right now it's just solid white at about 40% transparency with blurred edges.

I've heard of bump mapping but I've never used it, how does it work?
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Jul 7, 2011, 19:37
Post: #4
RE: [Help Needed] Batman spotlight on clouds.
(Jul 7, 2011 18:11)ipaq3115 Wrote:  I blurred the logo a bit, looks good, is there any way to make my beam of light look more realistic? Right now it's just solid white at about 40% transparency with blurred edges.
Post what you've got so far, it's hard to make suggestions blindly Smile

(Jul 7, 2011 18:11)ipaq3115 Wrote:  I've heard of bump mapping but I've never used it, how does it work?
It adds a 3D effect to flat surface by adding lights and shadows, as direct by the "bump map". The bump map (in Gimp) is just another layer, where 50% gray is "no change", lighter grays to white is "above", and daker grays to black is "below". For instace the map below:
[attachment=513]
will produce an outer ridge and an inner ditch:
[attachment=514]

The bump map is applied using "Filters/Map/Bump map". It acts as the current layer, whith a selector to select another layer as the bump map.

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Jul 7, 2011, 21:22
Post: #5
RE: [Help Needed] Batman spotlight on clouds.
Good idea Wink here's what I've got so far:

[Image: logo.jpg]
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Jul 7, 2011, 21:47
Post: #6
RE: [Help Needed] Batman spotlight on clouds.
Pretty good.. some improvements:
  • the beam should IMHO come from under and not from the side.
  • you can use a bit of inverse perspective distortion on the letters (wider on top)
  • in real life you won't see the beam over the clear sky. The signal works in Gotham because that city is perpetually under very dark clouds. Traditionally the beam is yellowish.
  • the bottom of the cloud could have a bit of relief, and the projection would be distorted to suit (bump map or displacement map or both)

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