I have a google earth mesh with a texture path string attribute on the prims. In Solaris I am using a mtlxgeompropvalue to import the string attribute. I can see the textures properly but in black and white. I guess its only reading in one channel. The Mtlximage node gives and error:

"
Error
Input storage type (uniform/varying) does not match input 'file'.
"

See screenshot

How can I get it to read the full color imformation?

Attachments:
screenshot.png (3.3 MB)

Thanks jsmack.

Your solution may very well work but its a bit beyond my current capability.

I dont see why I can get one channel working but there is no way to get them all... mtlx image read node is reading all the varying textures but only reading one channel.

I have it working fine in the old ROP render workflow using <basecolor_texture> overrides in Vray. I was hoping to make it work in Solaris and Karma.

Here is how it appears in viewport with geo spreadsheet:

Attachments:
mesh.png (4.3 MB)

It is actually working with Vray using a very simple mtlxImage with a <tex_path> string attribute. Oddly the same MaterialX material fails in Karma.

In the example there are two textures on alternating prims.

Attachments:
vray.png (2.1 MB)
karma_CPU.png (1.5 MB)

With the help of Peter Arcara, here is a solution with the current version of MaterialX (workflow will improve in the next one)

Attachments:
materialX_network.png (1.0 MB)