How to let Rhino show the true colour for Stable Diffusion's segmentation

Hi all, I am trying to make a Rhino template which can be applied to the Stable Diffusion’s ControlNet segmentation. But I am not sure how to let Rhino to show the true colour – no matter I use shaped mode or render mode, it will have a shadow effect on the Rhino objects(as shown)


You can see I have applied the RGB(255,6,82) colour on to the Rhino object. But the top, left and right face are showing different colour. How can I make them to be a true RGB(255,6,82) colour?
Many thanks

Does anyone know how to achieve it? I guess it should be quite basic?

Rhino’s shaded modes are based on lighting. As such, all sides will have different colors/values due to angle to the light and shadowing. If all the box sides were the same color/value, in a shaded view you would only see the outline and a flat color inside.

When exporting a raster image, you will have this effect. A 3d CAD file with the object will however have the same color value for all sides as an object property.

It might be possible to set an emissive material on the object and have it all have the same color in the image. Not able to try right now.

Edit:

Here is the result with a custom material with 0% transparency, gloss and reflectivity - with 100% emissivity that is the same color as the object material color (255,0,0). First with surface edges showing (so you know they are boxes):

And if I turn off the edge display:

Discourse does some weird things with the images, so don’t trust the uploads above, but after a ViewCaptureToClipboard in Rhino and paste into Photoshop, all the objects are red 255,0,0 everywhere (tested with the eyedropper at a number of locations).

In Rhino Render you get also the Albedo pass. This works for diffuse materials.

Cool, thanks Helvetosaur!

I see, thanks Nathan~