Forums Technical Discussion How to assign material for points?

How to assign material for points?

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iron100
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I need to assign emission material to some points of my geometry. I want to depict vehicle marker lights.
Material node doesn't work.
How to do it?

Photoshop example -

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bobcat
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You can use copy SOP to copy little spheres to your mesh and then by using material node you can assign material to them. Or make it a separate object with new node and object merge.

Attachments:
copy_spheres.JPG (101.8 KB)

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tamte
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or just use Add SOP to attach Particle primitive to your points, then assign your material to that primitive
but if you want to make it a light, you should render such geo as a Geometry Light to get better sampling
Tomas Slancik
FX Supervisor
Method Studios, NY
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iron100
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bobcat
You can use copy SOP to copy little spheres to your mesh and then by using material node you can assign material to them.

I thought about this method, and it works, done.
But why is it possible to assign material to polygons, but not to points? Such a process seems logical.


tamte
or just use Add SOP to attach Particle primitive to your points, then assign your material to that primitive
but if you want to make it a light, you should render such geo as a Geometry Light to get better sampling

Can you set an example? I'm not a professional of Houdini yet.
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bobcat
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“But why is it possible to assign material to polygons, but not to points? Such a process seems logical.”

I believe it is because points are infinitely small. They don't really have a surface by default.
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anon_user_37409885
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Houdini can render unconnected points as a sphere or flat disc, with a material assigned at scene level. Not very user friendly but possible.

Attachments:
Points.hipnc (432.3 KB)
Screenshot_20190206_120608.png (332.1 KB)

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