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Wrap Decal for procedural pattern?

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nicoM
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Hi all,

in shop network there is a texture node where you can wrap decal a picture.
If I want to do the same for a procedural pattern (the one provided with houdini) - how to accomplish this?

Thanks
Nico
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rafaels
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You could generate the procedural texture in COPs as an image, and use it as a texture map in your shader. Just input the path to the COP network in the file path for the texture map like this:

opimg/my_COP_texture

Just note that the “op:” command requires an absolute path.

Cheers
Toronto - ON
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nicoM
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Thank you rafaels.

This is a way to do it :-)

It harms that it is not direct possible in vob!
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rafaels
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I'm sure it is possible, you might just have to use 2d procedural generators and play with the uvs in your object… I haven't tried anything like that yet… :-)

Cheers
Toronto - ON
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“As technology advances, the rendering time remains constant.”
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keyframe
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Rafael is absolutely right.

You should look at using the modulo operator (in conjunction with mults/fits/adds as needed) on your uvs - or whatever it is that you are using to seed the procedural noise with (could be world space P, could be ‘rest’).

Cheers,

G
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nicoM
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I tried the method producing the procedural pattern in COB.
I then used the “op:” method …. but it doesn't work. Maybe I do soothing wrong ….

Here is a simple test scene how I did it:

Attachments:
Decal.hipnc (295.0 KB)

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nicoM
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@keyframe: can you tell me more…. I'm too new in houdini to understand what to do!

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nicoM
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Ok - I realized to crop the 2d pattern to the UV …. but the bounding colors of the pattern is repeated over the rest of the geometry.

How to rid of this bounding colors?

Attachments:
Decal_UV.jpg (216.0 KB)

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keyframe
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Use those same values to create a ‘mask’ (1 inside the range, 0 outside). Use the mask to blend between the procedural noise, and whatever else you need (solid color, a different procedural noise, etc).

G
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zarti
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nicoM
I tried the method producing the procedural pattern in COB.
I then used the “op:” method …. but it doesn't work. Maybe I do soothing wrong ….

Here is a simple test scene how I did it:

hi ,

this could be simpler than you think .

i downloaded your file and i think you better use the Copy'N'Paste ‘technology’ .

all procedural patterns are available in shops too . so , why bother with op's&Co ??

just copy-paste and you are done .



.cheers

Attachments:
copyPaste.png (13.3 KB)

except the things that cannot be seen , nothing is like it seems .
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rafaels
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zarti
nicoM
I tried the method producing the procedural pattern in COB.
I then used the “op:” method …. but it doesn't work. Maybe I do soothing wrong ….

Here is a simple test scene how I did it:

hi ,

this could be simpler than you think .

i downloaded your file and i think you better use the Copy'N'Paste ‘technology’ .

all procedural patterns are available in shops too . so , why bother with op's&Co ??

just copy-paste and you are done .



.cheers

Well, I think the only advantage of doing it in COPs is the “real time” feedback… I know there's the shader view pane and all… All these things that we forget in the rush of making something happen! ops:
Toronto - ON
My Houdini playground [renderfarm.tumblr.com]
“As technology advances, the rendering time remains constant.”
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nicoM
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Thank you keyframe …. I finally figured out how to get the mask out of the uv-values …. and now everything works fine

If someone as interest in how to get the mask out of the uv-value …. I can make a digital asset and upload it here!

Greets

Nico
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