defects in render mode

fario · January 23, 2013, 05:28:18 AM

Hello,

Do you know why I have these defects in the rendering?

Yet I have all my settings at maximum.

Thank you in advance.

Ruckus · January 23, 2013, 05:51:55 AM

Hard to say from that image resolution, but you might have normals flipped in your tessellation.

PhilippeV8 · January 23, 2013, 05:56:07 AM

- tesselation
- 2 planes touching
- hdri resolution
- ground plane size
- imported geometry
- ...

have all been issues witch related to shadows in the past. I feel like I forget one, but I dunno ..

What happens if you zoom in on the highlighted area ?

DriesV · January 23, 2013, 06:03:00 AM

Does the same thing happen when you render with a time limit?
Are those surfaces behind a glass lid? If so, it might be a global illumination problem.

I've run into likewise problems before when rendering objects behind glass, but only when using the advanced rendering mode. Time limit rendering went just fine.

Dries

fario · January 23, 2013, 06:49:39 AM

- tesselation perfect
- 2 planes touching no
- hdri resolution 512x256
- ground plane size 32
- imported geometry -
- ...

size 4000x4000

Here is a closer view image with the same problem.

DriesV · January 23, 2013, 06:54:38 AM

Looks like global illumination splotches to me.
On this type of scenes, they are hard to avoid when using advanced rendering.

Dries

KeyShot · January 23, 2013, 09:46:47 AM

For this scene you can use the max samples or time limited render modes. I believe the issues you are seeing are in the indirect lighting caused by the small geometric features.

One other option is to render the image at a higher resolution than you need and then reduce the size after it is done.

It would be great if you could share this model with us at info@luxion.com so we can take a look at it.

fario · January 26, 2013, 02:37:08 PM

Thank you very much for all your answers.

In fact, checking my file, I see that there is a little gap between the two parts of approximately: 0.05mm.

What makes that there is a ... mini shadow Keyshot must be resolved between the two parts.

Sorry, the problem is the accuracy of my modeling.
But it was interesting and informative!

Antoine