Circular lines in render

[01rich01]

I've notices if I add a plane at the origin and add an image texture, I get these strange circular lines in the render. They move with the camera. If I move the plane slightly up or down, the lines go away - anyone else get this?

[FooZe]

Hi,

This is currently expected behaviour for the checker-board.
What you are seeing is the indecision right on the border of the cubes that make up the checker-board in 3d space.

It's caused by the limited precision of floating point numbers. You can also solve the problem by translating the generated texture a bit.

Thanks
Chris.

[01rich01]

Thanks for the reply Chris. It seems this problem is not unique to the checker texture. Here's a scene with no materials at all.



I have currently installed:
Blender Octane Edition 2.68a
Octane Render 1.20
Octane Render 1.51
Octane Server 2.8

Are these the latest versions (how do I check that?). I'm wondering if its not an update issue, it could be a graphics card issue - i'm running 2x gtx770's

[glimpse]

isn't that a scale issue?
have You checked this? =)

(seems like the same problem I had
when started working with Octane).

[01rich01]

Yes! I scaled everything down and it sorted it. But is that the only way to solve this? What if I want to create a very large scene?

[FooZe]

This is a similar effect/artefact because both are related to floating point number precision.
You can also tweak the "Ray epsilon" in the kernel settings if your scene is very large (or small).

Thanks
Chris.

[01rich01]

Yep, changing the ray epsilon fixed it. Thanks!