Bump Maps Render Rough/pixelated?

[bicmaster]

Hi,

I've been experimenting with bump maps and can't get them looking correct. In photoshop I've taken care to make my colour transitions smooth and used blur, but the contours in the renders looks like the attatched file. I've tried various texture sizes from 512 x 512 to 2048 x 2048.

I was aiming to bump my character's ribs: I'm wondering now if bump are only suitable for fine lines and small bumps.

Can anyone advise please?

thanks,

[adam-clear]

Gubar,

If the resolution is adequate on your bump map and you're still getting choppy bumps it might be worth checking the settings on your light's shadows. From my experience, Depth Map shadows take more to fine tune than Raytraced.

If you're a new user I would suggest Raytraced shadows for now.

I hope this helps.

[kmaylahn]

that looks to me like a depth map shadow issue. Try adding some filtering which softens out the shadows, particularly useful when using lower res shadow maps such as 512k. You can also try looking at the filtering on your bump maps, both on the bump node and the 2D file node. Ive found it also helps increasing the res on the bump map, but for what your doing there, I would say you just need to play with filtering and shadow maps...

Justin

[joojaa]

i don't think its a dmap issue. why would it theres only one plane in the image and why would anybody sane put shadow to this.

Anyway what it look slike is the stamping density of photo shop comming trough and im afraid blurring dont reduce the noise caused by something like that unless of course the blur is much bigger than the noise step and its applied a many many times. THat or then just plainb fact thet theres some noise in the ramps used.

Se the problem is that our eyes wont see a few pixel caruations but derivating a field like that is visisble thats sure as hell is visible.