Using Camera Map projection, you can "animate" some material features. Here with a grandient bitmap, applied in Roughness and Emittance and moving the camera.
The penalty is that you can use it for any bitmap, but not layer weight, bump and diplacement.
I think it's an interesting method, limited but simple and quite usable.

<Edit: Actually, it works fine with layer weight maps. Was wrong about this.

Maybe this video is not the best example to see what can be done, but I was playing with this "heating metal thing".
If I get some other acceptable test will put it here.

Another test, moving clipping map of the cylinder (near to far and back).
Also emittance map for the light cube, both maps are just black and white stripes.

Would be fantastic if in the future can be used for displacement....

That is very clever
How did you achieve that?
Really nice Rosco

Nice one Rosco.

Well done

Very nice,

I will have to have a go now!

Thanks to all.
I was looking for a way to make an object disappear for a presentation, and I thought that with Camera Mapping should be able to change the opacity. I'm still playing with more options.
Also want to try this with moving objects and linked cameras, water effects...

There are many possibilities, and is simple. The downside is that it is difficult to achieve fine adjustments, because no preview for this type of projection, so you have to work manually with IR to see how camera movement affect maps. But it's cool .

I´ll keep tying and showing.
Regards.

i don't understand how you animate texture but anyway, congrate

great tests Rosco!
if i am not mistaken, you are using blender, so check if blender support camera mapping in the viewport.
i think (but that depends on how you want the object to disappear) you should use the camera marping texture to the alpha channel. i.e a black-to white gradient attached to an animated camera moving up/downwards should graduallly disappear the geometry.
regards,
george

I'm working on an animation with a more practical use of it. I hope it will acceptable to post it.
Meanwhile, another test. (I went "too far" with DoF)

@yglemarec: Thanks. Just using camera map projection on bitmap options for the texture, then moving the chosen camera textures move whith it.

@george: Yes, what you say is the best way (I think). And yes, I use to model with Blender. Not an expert with mapping, but there is not exactly a Camera Map projection.
What you can do in Blender is to use keyframing with the position and scale of the textures (almost with everything), but when you export a model is generated per frame, and you have no control after.
Inside Thea is much easier and editable .

One more test. Cutting of a Rocking Panton Chair (just a joke), which could obviously be anything.
Cutting is made with a camera (Clipping), the white line with other displaced a few centimetres, changing material with a third camera (both layer weight), all with the same motion.
Not much quaility, but it's just to see the idea.

A point is that when using Adaptive BSD must increase the tracing depth (in this case to 8) to display properly (and it took me a while to realize)