Can I edit glow on differnet objects/same shader?

[graff]

I am doing an animation of the inside of the eye. I have a ball of light soaring into the scene and hitting a rod at the base of my model. From there, I have some lightning moving through the rods/cones and being absorbed into the tendrils.

I want the tendrils close to the lightning to be brighter than those far away. I have hundreds of tendrils, ALL glowing at the same time becuase I am only changing my glow property on the shader. How can I change in on a per object basis?

I did come up with a decent solution I think, whiich is to duplicate the shader about 5 times and assign it to the different objects so I could change the glow that way.

You can look at my pic to visualize what I am doing.

[gmask]

You will have to make a shader for each object.

[stevesayer]

Perhaps I'm misunderstanding, but it seems to me there's a simpler solution.

Just make a radial Ramp texture, and project it down along the length of the cells (centered so that the bright center of the ramp is located over the location of the lightning). Now attach that projection to the Glow Intensity of your shader. If I've interpreted things correctly, that should make the tendrils closest to the lightning (which are receiving the bright center value of the ramp) glow brightly, while the tendrils further away (lying under the darker outer area of the ramp) will remain dim.

Make sure you do NOT tile your ramp texture, and that you set the Default Color to black (so that tendrils outside the projection don't glow at all). You can use some UV noise on your ramp to break up the symmetry of it, etc. etc...

Let me know if there's something I've missed.

Good luck! --The shot looks great!

-Steve

[gmask]

Good one

[stevesayer]

Thanks.

I'm only batting .500 or so today, tho'.

-Steve

[provide]

Utilites -> Single Shading Switch

Connect output of this to "Glow Intensity" of your shader, Add your surfaces to switch list using "Add Surfaces" button and then "map" Glow Intensity values for each one.

Hope this helps,

Martin