Shading errors (56k warning)

[Skeletor]

Hi,

I'm getting some issues with the shading being sort of blocky. Here's an example

It's easy to see on the pelicans chest area and beak

[matej]

See this post. I think it's the same issue

[Skeletor]

Thanks for the reply. Setting the ray epsilon to 0.0 makes it look worse though. Also there isn't any bump maps on this model

[jakchit]

have you tried recalculating your normals?

[Skeletor]

How do you do that in Max?

Those jagged edges seems to appear on any organic model I've made given the right lighting

[jakchit]

im no max user but maybe this link can help you find it.

http://www.recipester.org/Recipe:Flip_n ... x_35682020

[jakchit]

also, maybe you have a copy of the model right on top of another copy

[ROUBAL]

also, maybe you have a copy of the model right on top of another copy

Seeing the last image, it is also my opinion.

[matej]

This is the terminator problem

If rayepsilon doesn't work, then your next best option is probably to subdivide the model further. This will just make the artifacts smaller, though.

[Skeletor]

There is only one model.

I tried rendering the model with different levels of turbosmooth. Here are the results

1 smooth iteration

2 smooth iteration

3 smooth iteration

4 smooth iteration


One iteration looks very jaggy, 2 iterations less so and 3 you can barely notice and four is completely gone it seems.
So it does seem to be the "terminator problem". Thanks for clearing that up matej

I haven't experienced this problem using mental ray, so I don't know if it is a bug or not in Octane.