View Full Version : Metal Reflection....HELP!

11 November 2003, 04:58 PM
How can I achieve a realistic metal reflection?

I'm trying to make a gear logo for a student company (my college game dev team). And I have the gear within a sphere with high lumionsity because I'm radiosity'n it up.

How can I achieve a realistic metal reflection?

And how do you use reflection maps?

Thanks for all of your help thus far guys!

Steve Warner
11 November 2003, 05:09 PM
Read through this tutorial. It will teach you how to create realistic reflective surfaces.

Hope this helps!


11 November 2003, 05:53 PM
If you are trying to create a metalic surface I would not use radiosity. Especially not from a sphere.

You can apply the reflection by adding an ImageWorld (under the backdrop options), or applying the reflection under the enviorment tab.

You should take down the diffuse and give it a little reflection bluring (under the Enviorment tab). You should also put a gradient on the reflection channel.
For an idea of the gradient, look at the ones that some of the crome presets have.

Hope that helps. :thumbsup:

Steve Warner
11 November 2003, 07:54 PM
Here's a quick test I put together.

Feel free to download the object and scene files ( and check out the texturing. The key here is window objects with high luminosity. The gradient textures on the ball are there to simulate the Eresnel effect.

11 November 2003, 08:07 PM
What kind of metal are you trying to make? Chrome, steel, another kind? It's kinda difficult to give tips if I don't know what look you are after :)

11 November 2003, 04:54 AM
I'm trying to make steel.

And thanks Steve. That those things would help me greatly!

11 November 2003, 05:21 AM
I like HDRI for metal reflections.

11 November 2003, 06:32 AM
For realistic metals:

- Use non-rendering reflection cards or an image (HDR or not) as an environment. What's improtant is that you have something for your object(s) to reflect.

- Alot of metallic surfaces have anisotropic specular reflections, so you should probably use the BRDF shader.

- Make sure your reflections are blurred. Reflections in real life are not perfectly crisp.

- Reflection caustics should be used. No reason to if you don't have a diffusive ground, walls, or other objects, though.

- Dirty up the metal (unless it was just made).

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