Hi, wanted to see if someone in this forum could point me in the right direction:

How do you do map transfer/generation in between two meshes in Houdini? some examples of what I am looking for:

- Create a tangent space normal map from a hi res mesh (without UVs) to a low res mesh

- Transfer the color map from a scan model to a low res model without transfering UVs (by doing ray intersections in 3D space)

What I am looking for is similar to the transfer maps utility in maya or the ultimapper in XSI (however, I am looking for basically the results, even if the process is completely different) . I looked into the help, through several forums, etc. but could not find anything in regards to this.

Thank you in advance

Hi,

an option could be to use the AttribTransfer SOP, it works by proximity
so you don't need UVs.

creating a shader that raytraces up and down the normal of your low res mesh with the tracing scoped only to the hi-res mesh is the way to go. you can then use mantra -u to save the results as a texture. too busy to make an example right now, but maybe later in the day i can post a file.

i do this a lot (mostly with scan data) and mantra does a great job at it.

-b

grayOlorin
Hi, wanted to see if someone in this forum could point me in the right direction:

How do you do map transfer/generation in between two meshes in Houdini? some examples of what I am looking for:

- Create a tangent space normal map from a hi res mesh (without UVs) to a low res mesh

- Transfer the color map from a scan model to a low res model without transfering UVs (by doing ray intersections in 3D space)

What I am looking for is similar to the transfer maps utility in maya or the ultimapper in XSI (however, I am looking for basically the results, even if the process is completely different) . I looked into the help, through several forums, etc. but could not find anything in regards to this.

Thank you in advance

found an old setup to get the maps off of a scan, swapped in some simple geometry for sharing:


good luck dude

Wow man! Thank you for this example! This is what I was looking for

Love the fact that you can basically bake whatever you can trace…! This is great stuff

Thank you all for your replies!

Hi

The sample by brian is giving me error

“mantra: UV rendering unsupported with ray tracing.” I tried other engines as well and does not seem to change the result.

Hi are you rendering inside if render view, mplay, or to an image? I have found that rendering to uvs does not play well with render view

Also, are your render engines using micropolygon?