holographic material

[neo0.]

Somethign like this


Basically, a material that is somewhat transparent and glows..

[Borgleader]

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

[ZYX]

emitters can be blended?

[Borgleader]

emmiters can be blended?

i dont know, maybe? im noob, i was just speculating.

[dougal2]

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]

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.

[CTZn]

Now what about a wireframe shader 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

[neo0.]

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.

[CTZn]

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.

[neo0.]

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

[CTZn]

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.]

Would it be possible to create a colored holo material..? See attachedd

[PureSpider]

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

[CTZn]

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.

[neo0.]

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.