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Geometry paint mask and Object Subdivision

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Geometry paint mask and Object Subdivision

Unread postby gamaiunchik » Tue Jan 09, 2018 12:06 pm

Hey guys!

My first question is about a geometry paint. As long as I understand there is no way to paint on the geometry inside Clarisse. Which means that If I would like to mix my shaders I need to paint a matte in another software? I can actually scatter a slopes onto geometry and feed its result to a shader. But this solution seems awkward to me.

And the second question is about subdividing a geometry parts differently. Lets say I've got a alembic with more than one object inside. Some of them require a subivision, some does not. For now I just switched off the parts that I want to subdivide, copied this geo and reversed the selection in new one. Then I subdivide the copy to a desired level. Is there any other way to solve this?

Thanks a lot!
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Re: Geometry paint mask and Object Subdivision

Unread postby dboude » Tue Jan 09, 2018 12:17 pm

You can't paint inside Clarisse, so yes you have to paint your masks outside.

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Why ? Subdivision attributes are per objects, you can set a subdivision level for each object of your alembic import.

Cheers !
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Re: Geometry paint mask and Object Subdivision

Unread postby gamaiunchik » Tue Jan 09, 2018 1:22 pm

I expressed myself unclear. I meant that if an alembic has a single object with a different shading groups inside. Not a multi object abc.
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Re: Geometry paint mask and Object Subdivision

Unread postby dboude » Tue Jan 09, 2018 3:06 pm

You can't have a different level of subdivision on shading groups.

And your technique of duplicating objects to have different subdivision levels is useless as the hidden geometry is still stored in memory. Just set the maximum subdivision level you want and duplicate/instantiate your object.

Cheers
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Re: Geometry paint mask and Object Subdivision

Unread postby ambassador1 » Tue Jan 09, 2018 9:05 pm

Actually ;) , you can paint in clarisse, no UVs needed, and across multiple objects...quick proof of concept, could be explored much more.
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paintInClarisse3.jpeg
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Re: Geometry paint mask and Object Subdivision

Unread postby ambassador1 » Tue Jan 09, 2018 11:36 pm

across scattered objects
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Re: Geometry paint mask and Object Subdivision

Unread postby ambassador1 » Wed Jan 10, 2018 12:26 am

A little less crude example, cbb. Painted mask in clarisse, with live texture wear, mask is masking between two different materials, no uvs.
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paintInClarisse6.jpeg
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Re: Geometry paint mask and Object Subdivision

Unread postby dboude » Wed Jan 10, 2018 9:28 am

:D

Do you use particle paint with the point cloud texture to do that Ambassador? Occlusion of invisible scattered objects on that same container, perhaps? Or do you have another technique? I'm curious.

Cheers ;)
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Re: Geometry paint mask and Object Subdivision

Unread postby ambassador1 » Wed Jan 10, 2018 8:37 pm

Yes, particle paint attributes to drive a mask>any shading peram.

It can even be used for voxel sculpting. Single volume cube. quick proof of concept tests, no use for it at the moment.

Image
Image
Image
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Re: Geometry paint mask and Object Subdivision

Unread postby gamaiunchik » Thu Jan 11, 2018 5:53 pm

Hey ambassador1!
The point cloud texture is a new thing to me. Thanks for that!

I tried it myself but have few questions.
1) To make feather around the points irregular I used a fractal noise and a multiply node. Is there any other way to broke it up?
2) I tried to use a scale attribute of the points to derive a point radius of point cloud texture. But it doesn't work in my setup. What am I doing wrong?
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