holographic material

General discussion about Indigo Materials - material requests, material developement, feedback, etc..
neo0.
Posts: 1784
Joined: Thu Feb 28, 2008 7:11 am
Location: the US of A

holographic material

Post by neo0. » Sat Jun 28, 2008 8:45 am

Somethign like this
Image
Image
Basically, a material that is somewhat transparent and glows..

User avatar
Borgleader
Posts: 2149
Joined: Mon Jun 16, 2008 10:48 am

Post by Borgleader » Sat Jun 28, 2008 8:53 am

Hmm that would be interesting. I'm guessing an emitter, blended with a transparent with an IOR of 1. or something as such.

User avatar
ZYX
Posts: 140
Joined: Sun Dec 02, 2007 12:35 pm

Post by ZYX » Sat Jun 28, 2008 8:55 am

emitters can be blended?

User avatar
Borgleader
Posts: 2149
Joined: Mon Jun 16, 2008 10:48 am

Post by Borgleader » Sat Jun 28, 2008 8:55 am

ZYX wrote:emmiters can be blended?
i dont know, maybe? im noob, i was just speculating.

User avatar
dougal2
Developer
Posts: 2532
Joined: Wed Nov 15, 2006 8:17 am
Location: South London

Post by dougal2 » Sat Jun 28, 2008 10:39 am

emitters cannot be blended, they're not materials.

You should be able to get transparent anything by blending with the null material.
As for glowing, I think you'd have to use some clever lighting, and add bloom/glare in post.

SimonLarsen
Posts: 289
Joined: Wed Apr 18, 2007 1:52 am
Location: Odense, Denmark

Post by SimonLarsen » Sat Jun 28, 2008 10:51 am

If it has to be glowing, I think the best thing to do is, to do it in postpro.
You could do a render with a textured emitter, and one without. And blend them.

Or just do a render without the hologram, and photoshop it in afterwards.

User avatar
CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Post by CTZn » Sat Jun 28, 2008 11:24 am

Now what about a wireframe shader :roll: sorry I'm a bit sarcastic right now... ok voxels with nice interpolation would work better here my two cents, better holographic look because borders not too sharp unlike surface wich is sharp sharp sharp
obsolete asset

neo0.
Posts: 1784
Joined: Thu Feb 28, 2008 7:11 am
Location: the US of A

Post by neo0. » Wed Jan 14, 2009 12:40 pm

How about something a little simpler.. A color display embedded in glass?
http://www.youtube.com/watch?v=jPauljzA ... re=related

Another example of a hologram is attached. If a new material type is needed (say "transparent glow" or something) then I think it would make a valuable addition.
Attachments
yp.jpg
yp.jpg (132.33 KiB) Viewed 4094 times

User avatar
CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Post by CTZn » Wed Jan 14, 2009 7:42 pm

An holographic material looks like this:

Code: Select all

<medium>
	<name>blinn1_medium</name>
	<precedence>6</precedence>
	<basic>
		<ior>1</ior>
		<cauchy_b_coeff>0</cauchy_b_coeff>
		<absorption_coefficient_spectrum>
				<rgb>
					<rgb>0 0 0</rgb>
					<gamma>2.200000048</gamma>
				</rgb>
		</absorption_coefficient_spectrum>
	</basic>
</medium>

<material>
	<name>blinn1SG</name>
	<specular>
		<transparent>true</transparent>
		<internal_medium_name>blinn1_medium</internal_medium_name>
		
		<texture>
			<uv_set>default</uv_set>
			<path>C:\work\3d\Indigo\dev\shaderV2\hologram.png</path>
			<exponent>2.2</exponent>
			<b>1</b>
		</texture>
		
		<base_emission>
			<constant>
				<rgb>
					<rgb>5000000 5000000 5000000</rgb>
					<gamma>1</gamma>
				</rgb>
			</constant> 
		</base_emission>
		
		<emission> 
			<texture>
				<texture_index>0</texture_index>
			</texture>
      </emission> 
      
	</specular>
</material>
the screen is totally invisible (it does not interact with light), even not casting shadows. Only the light it is emiting is visible. As such it's also the perfect candidate for laser beams.

edit: I'm insisting on the fact that, as a specular, this material will only work on closed meshes (volumes). Here I'm using a shrinked cube, it's no plane.
Attachments
hologram.jpg
screen is a thin sheet (volume)
hologram.jpg (33.35 KiB) Viewed 4077 times
Last edited by CTZn on Sun Jan 18, 2009 8:27 am, edited 2 times in total.

neo0.
Posts: 1784
Joined: Thu Feb 28, 2008 7:11 am
Location: the US of A

Post by neo0. » Thu Jan 15, 2009 8:15 am

Looks great ctzn! Im gonna see if I can use this with skindigo.

User avatar
CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Post by CTZn » Mon Jan 19, 2009 1:01 am

After you asked for the same thing again otherwhere I suppose you could not, did you ? This is the topic where you should have continued on...

I have myself written this shader by hand, the Maya to Indigo exporter is being reworked to export such materials out of the box (ie without string replacement, really by exporting material parameters).

I don't think you have asked in the SKIndigo forum on that matter, sorry neo0. but what is your head at ? If you can't use raw xml please stick with your exporter forum.

If I was admin, this would be a warning, sanctioned by the destruction of this thread without further comments.

Lucky you, that's just me.

neo0.
Posts: 1784
Joined: Thu Feb 28, 2008 7:11 am
Location: the US of A

Post by neo0. » Mon Jan 19, 2009 9:17 am

Would it be possible to create a colored holo material..? See attachedd
Attachments
reex.jpg
reex.jpg (143.58 KiB) Viewed 3963 times

User avatar
PureSpider
Posts: 1459
Joined: Tue Apr 08, 2008 9:37 am
Location: Karlsruhe, BW, Germany
Contact:

Post by PureSpider » Mon Jan 19, 2009 9:24 am

:roll:
Nothing more to say... that is just unbeliveable...

User avatar
CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Post by CTZn » Mon Jan 19, 2009 9:32 am

I will follow up soon on this, wanting to do a better image than above (edit: referring to mine, of course :)).

The material will be the very same, so the answer is "yes it would", if I am correct.
Last edited by CTZn on Mon Jan 19, 2009 10:09 am, edited 1 time in total.

neo0.
Posts: 1784
Joined: Thu Feb 28, 2008 7:11 am
Location: the US of A

Post by neo0. » Mon Jan 19, 2009 9:59 am

Instead of using an texture, could could theoretically just use geometry apply the mat to it, right? I mean, I think thats what they did in those CG movies that I took the pics from.

Post Reply
29 posts

Who is online

Users browsing this forum: No registered users and 2 guests