Houdini 20.5 - Rasterize attributes using VEX in COPs

[@Sead1337]

How to do this in 1d noise? seems like cant fix seams in 1d noise

[@massimobaita7178]

Thank You very much, Rohan!

[@Mega-Tales]

great but what is the point of this?

[@johannestiner]

Nice one! Gotta love the new COP 😊

[@Artichoke18]

Thanks so much! Do you think this is a problem that SideFX will adress in future updates? So COPs working in a way that handles UV seams better... I guess would be nice to don't need this workflow everytime....

[@rohandalvi]

No idea. But This is the first version of COPs , it should improve with time . You can report this to sidefx support so they know it's an issue. I'm too lazy to do it😅

[@karlisstigis]

Very useful, thanks.

[@namearchi]

Cool stuff thx, any idea is bringing heightfield masks available in new cop WITHOUT converting it into geo, as its normally super heavy and all setup becomes too glitchy...

[@damjanmx]

Check out the Geometry tp Layer node in COPs

[@paoloricaldone6273]

thanks

[@kir11]

This seams. Is it a bug or a normal work of a copernicus?

[@rohandalvi]

It’s a limitation on how it currently imports the data into uvs. Hopefully they’ll correct it in the next version.

[@wewantmoreparty]

now we just need a good workflow for UDIMS in COP :)

[@VFX4DESIGN]

There is curvature in Karma CPU and now AO in both CPU and XPU. I’m sure it’s only a matter of time like always…. great tips thanks

[@frigbychilwether]

Hi, handy tip. My hands were hovering over the keyboard to ask about needing the layer when you didn't add the uv one, but you noticed it first !

[@rohandalvi]

😂

[@krylonpoet]

I second your request to have a bake curvature node in cops. The lack of bakers in cops is frustrating. I know I can do some of this with a lends shader in karma, although there is no aov for curvature. It would be SO convenient to bake to texture or 2d volume in cops. It’s really a pain to subdivide the geo to get detail needed for rasterization, and even after subdivision it is just not the same as a bake.

[@kamazooliy]

Are there workarounds you've tried we could learn from?

[@nickcentanni1500]

You can use recipes now to do what you did with the shelf near the end of the video, in case you hadn't looked into them yet.

[@rohandalvi]

I haven't checked out recipes at yet

[@kamazooliy]

​@@rohandalviYou really should Rohan. It's a quick system to learn and eternally useful. You can also share the recipe files to other to build networks quicker.

[@hristovelev3906]

I doubt it could be done straight in cops, because it looks like it doesn't have access to the geometry. SOP, and the renderer have access to it.

[@HristoVelev]

the primuv uses intrinsic uvs, they are continuous and cover the entire surface, unlike explicit uvs that have seams. That vex looks a bit weird though - looks like the xyzdist doesn't do anything?

[@HristoVelev]

Thanks for these videos! I haven't started digging much myself yet, so it's very interesting to see the thought process.

[@rohandalvi]

I just did a copy paste. I'll try to remove the xyzdist and see if it breaks the code.

[@damjanmx]

@@HristoVelev xyzdist is outputting the prim number and it's intrinsic uv's that are used in the primuv function to sample the attribute.

[@HristoVelev]

@@damjanmx there would be a variable on the left side of '=' to store the result of it though?