Thin objects dissappears in rendering...?

[Jesper]

I'm currently working on a bridge with some cables. When I render the scene part of the cables disappears. The irradiance map preview looks fine - all the cables are there....

I also get an error when rendering: something about my bounding box is too large...... what does that mean and is that the reason of the missing cables?

See image for details...

[dimo]

Hi,

most likely your min samples are not high enough. What kind of AA are you using? If you use an adaptive sampler you should increase your min samples.

Dieter

[mike.edel]

looks like your antialiasing settings are too low
(if you use adaptive subdivision, your minimum rate should be at least 0 or even 1)

[Jesper]

Thanks, that helped. But the rendertime also increased a lot. Do you know any tricks for a quicker rendering time?

[jujubee]

What type of lighting are you using?

[Jesper]

A sunsystem with a multiplier of 0,7 - that's it. (and of course GI turned on to get an oveall lighting of the scene...

[vance3d]

you ould try switching to adaptive qmc. I think it handles thin geometry better than adaptive subdivision.

V Miller