Clip Maps Tweet

[gordonrobb]

Can't find it anywhere. Can I use clip maps with Octane? If so how?

[juanjgon]

Can't find it anywhere. Can I use clip maps with Octane? If so how?

To configure clip maps in Octane you need to use the "opacity" input available in all material nodes. You can link the mask texture to this input to get the clip map effect.

-Juanjo

[gordonrobb]

Thanks.

[BorisGoreta]

But this does not work with deep channel kernel and depth map. How do I render a depth map of the scene full of trees with alpha maps on leaf polygons ?

[juanjgon]

But this does not work with deep channel kernel and depth map. How do I render a depth map of the scene full of trees with alpha maps on leaf polygons ?

Are you sure ... here it works.

-Juanjo

[BorisGoreta]

I suspect there is a bug. Check out direct light render, all leaves are rendered correctly. On the depthe channel render only one leaf surface is rendered with opacity ( there are 3 leaf surfaces ). Other two surfaces are completely opaque.

[juanjgon]

Boris, the problem is the material mixer node you are using in some leaf materials.

I think that this is a limitation of the InfoChannel kernel design, that only evaluate first material node available in the object to make possible a fast buffer rendering without a full shader tree evaluation. If the first node is the material mixer, that doesn't support opacity, you don't get the clip map.

The workaround is to don't use the material mixer node for render buffers, you need to link a material with the clip map to the root node material input.

-Juanjo

[BorisGoreta]

Ok thanks for explaining. Good to know.