VRay Rendering Grasshopper Material

Grasshopper
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1

Hello,

I am working on a Grasshopper script and having trouble with a VRay material.
I made the VRay material from a Rhino material. When you render it through the VRay renderer, it looks fine.

VRay-Render-Normal
VRay-Render-Normal.PNG966×549 745 KB

In Grasshopper, I’m trying to use the VRay Render node. I selected the object and applied the same material I’m using in the renderer for the VGeo node.
VRay-Node
VRay-Node.PNG1292×479 67.5 KB

BUT when you render out the image from that node, the material doesn’t show up.
VRay-Node-Render
VRay-Node-Render.PNG990×655 789 KB

Could someone help me with getting the Grasshopper VRay node show the material?

EDIT: Bonus points if you can tell me why the rendering from Grasshopper is upside-down as well. :wink:

Thanks in advance!

Lynn

2

Hi.
If you want to render the GH vray material with the rest of your rhino scene, i think you have to add another component, called scene (render in project on the tab). This ‘exports’ the grasshopper objects back to the vray rhino render.

Hope that helps!

mat-scene-vray
mat-scene-vray.JPG1160×451 33.4 KB

3

Hi Fin,

Thanks for the tip! That’s not exactly what I was looking for, but I didn’t know you could do that. :slight_smile:

I’m rendering the scene in Grasshopper by right-clicking the V-Ray Render node and going to Render.

VRay-Render-Right-Click
VRay-Render-Right-Click.PNG548×527 23.5 KB

I’m doing this because I have other parts of the scene highlighted in the Grasshopper scene showing up.
So it’ll have to be done through GH and I won’t be able to export. (I think.)

I’m just trying to get a material that’s already in my scene (and is shown in a regular Rhino VRay render) to show up with right-clicking, rendering in GH.

I hope that makes sense!
Let me know if you need me to clarify.

4

It may be a problem that your vray material was converted from a rhino material.

It is a corner case and I don’t think the gh components were tested to that extent. I would recreate the material in pure vray form.

Another thought: if you are using scripting through ghpython or C# components in your definition, you can issue a rhino Render command (rs.Command) and trigger the normal rhino render sequence inside your gh definition.

That’s all I can think of.