Bake procedural texture Cd to uvs

Forums Technical Discussion Bake procedural texture Cd to uvs

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merlino3d: Member; 65 posts; Joined: Feb. 2013; Offline

May 26, 2017 10:52 a.m.

Hey guys,

I'm creating a procedural texture over a grid (with vertex UVs) and I need to extract the Cd texture procedurally generated as a texture that I can read back as file.

Which is the correct way of doing this?

Thanks in advance!
Marco


Enivob: Member; 2529 posts; Joined: June 2008; Offline

May 26, 2017 7:40 p.m.

The simple way is to just place a camera above the grid so it is framed exactly to the size of the grid and render out a single frame, or an image sequence if your procedural texture is animated.

But I would like to know if there is a better way then that?

Using Houdini Indie 20.0
Ubuntu 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.


madrenderman: Member; 129 posts; Joined: June 2016; Online

May 27, 2017 12:36 a.m.

Maybe the bake texture ROP is the way to go, but I never had luck with it


merlino3d: Member; 65 posts; Joined: Feb. 2013; Offline

May 27, 2017 12:44 a.m.

Hi guys! Thanks a lot!
I tried the bake texture ROP but I can't make it works as I would expect.
And the camera above the grid is the solution I'm using right now, orthogonal and cropped by the grid itself. But I think there should be a better workflow for a simple bake… at least I hope so

Thanks!


Konstantin Magnus: Member; 670 posts; Joined: Sept. 2013; Online

May 27, 2017 4:51 a.m.

If its just a regular grid, you wont need baking after all. There is an importpoint node in COPs that can read in attributes from geometry. Just make sure the grid resolution matches the image size. It also works for animation.

Attachments:
pointcolor_to_cop.hipnc (58.0 KB)

https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]


Enivob: Member; 2529 posts; Joined: June 2008; Offline

May 27, 2017 9:32 a.m.

Thanks for the example file, that is good to know.

I thought I would try an attribute from map and see it that could be “relayed” but it does not seem to work. I have assigned the map to Cd but COPs does not pick up on that. It seems like a refresh problem. Is there a way to make COPs refresh and pick up the new data?

Edited by Enivob - May 27, 2017 09:32:39

Attachments:
Untitled-1.jpg (237.3 KB)
ap_pointcolor_to_cop.hipnc (129.0 KB)

Using Houdini Indie 20.0
Ubuntu 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.


Konstantin Magnus: Member; 670 posts; Joined: Sept. 2013; Online

May 27, 2017 11:12 a.m.

Works on my side.

Attachments:
pointcolor_to_cop.hipnc (145.9 KB)

https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]


stronglikebool: Member; 28 posts; Joined: Sept. 2008; Offline

Dec. 4, 2017 2:04 a.m.

With the Bake Texture ROP you have to ensure that your shader is outputting the vex variables that the Bake texture rop needs to read. For instance, if you wanted to output color, you could import your Cd to your material, and then use a Bind Export to set the vex variable Cd for export.

www.earthfixed.com


Enivob: Member; 2529 posts; Joined: June 2008; Offline

Sept. 10, 2020 8:29 p.m.

I am trying to use this technique to get my optical flow color vector to an image format. I can't seem to get the COP to generate any output.

Can someone look at my scene?

Attachments:
ap_optical_flow_footage_091020.hiplc (1.2 MB)

Using Houdini Indie 20.0
Ubuntu 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.

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