silly question about Bump map

[SheepFactory]

You can use displacement for the cracks for more realism.

Just layer all kinds of stuff on top of each other.

And yes , both bump maps and displacement slows down the render (displacement slows it down more)

Ali

[Atyss]

The answer to both of your questions is yes.

Bump map really increases rendering time. That's an unfortunate reality.

And it also directly affects that anti-aliasing. For instance, if you put a too strong bump maps or not enough sampling values, you will get flickering artifacts on the screen if the camera moves in the scene.
The tricks to avoid that are:
- Put the lowest possible bump value (Factor). Bump is there only to provide a feel of the surface, not to distort it. Too strong values result in unnatural black spots that may flicker on the screen.
- Use high sampling values. In case you have a high resolution map with lots of details, lower the anti-aliasing treshold to 0.025 and the sampling to 0/3.
- Use elliptical filtering. This will greatly reduce the impact of the bump contrast (causing flickering).


Hope this helps
Salutations - Cheers
Bernard Lebel

[SheepFactory]

Thanks for the tip Atyys , you rock man :beer:

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