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Noise scale as a function of distance from camera?
I have an object which is darkly lit with very wide lighting falloff. At first, I was getting banding even with 32-bit renders. I added a very slight bump with noise to my texture and the banding disappeared, even with my noise bump practically invisible. However, my subsequent scenes have parts of the object very close to my short-lensed camera and very far away. Close to the camera, the noise bump becomes apparent, but farther away the banding is reintroduced. Is there a way to adjust the bump map scale of this object’s texture as a function of distance from my camera? Is this something that can be achieved through Xpresso?
Thanks for any ideas.
Mike Gottschalk
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1 Reply
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The apparent banding is a product of your display — not the actual file. It can’t produce enough shades of gray to show a smooth ramp. That doesn’t necessarily solve your problem if the final output device suffers the same limitation….
My suggestion is to overlay a very fine noise over the render in AE or the compositing app of your choice. It’s effective and I don’t think there’s an easy way to scale bump over distance.
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