So I understand there is the SaveVisopt command to view and edit VRay Options. vRay = rs.GetPlugInObject("V-Ray for Matrix") vRay.SaveVisopt('c:/temp.vropt') Is there a similar command to access the options of the VRay materials editor? SaveVismat doesn’t seem to exist!

Check this thread: [image] V-Ray Scene Editor/Environment Maps in Python I'm wondering how to control the V-Ray Scene Editor using a script. I want to create a script that will load an environment map (.hdri file) and then render. Does anyone know of any scripting methods for this purpose? Reading time: 3 mins 🕑 Likes: 9 ❤ This might lead you in the right direction…

@dale I guess that discussion is a little different because it’s for loading environment maps.What I’m trying to do is this: I want to make my script access the vrmat file of a particular material in the design and change a couple of its settings which I would manually do on the VRay Materials Editor (picture below) [image]

So I might have just found the solution to this. And, that is current_scene_materials.xml which I found in C:\ProgramData\VRAYMATRIX2\VfMatrix64. This xml file has all the material parameter settings of the current scene.

@matt_newberg, anything you can add to this conversation would be great.

[image] krsnadas: SaveVismat doesn’t seem to exist! Below is how to save a vrmat of the material named Test. vRay = rs.GetPlugInObject("{E8CFE179-B60C-411A-8416-62A893334519}") vRay.SaveMaterialToFile("/Test" , "c:/test.vrmat") # this will prompt for file name #vRay.SaveMaterial("/Test")

[image] krsnadas: I want to make my script access the vrmat file of a particular material in the design and change a couple of its settings which I would manually do on the VRay Materials Editor You can also read/modify the materials by using the script functions: GetMaterialParameterFloat GetMaterialParameterBool GetMaterialParameterInteger GetMaterialParameterCompTransform GetMaterialParameterString SetMaterialParameterFloat SetMaterialParameterBool SetMaterialParameterInteger SetMaterialParameterCompTransform SetMaterialParameterString Below is a sample of using one of these functions: import clr clr.AddReference("System.Xml") import System.Xml from Rhino import * import rhinoscriptsyntax as rs def changeAlpha(): vRay = rs.GetPlugInObject("{E8CFE179-B60C-411A-8416-62A893334519}") alpha = clr.Reference[System.Object]() (result) = vRay.GetMaterialParameterFloat( "/Test", "alpha", alpha) alpha.Value -= 0.1 RhinoApp.WriteLine(str(alpha.Value)) vRay.SetMaterialParameterFloat( "/Test", "alpha", alpha) changeAlpha()

@matt_newberg makes me a very lazy programmer because he leaves no room for exercising my own head :slight_smile: …only kidding; your help is much appreciated. Thanks!

Is System.Object a reference to Javascript? Also, what is that plugin object string you passed to GetPlugInObject?

[image] krsnadas: Is System.Object a reference to Javascript? No it is the Iron Python type needed to receive the data from the RhinoScript object. [image] krsnadas: Also, what is that plugin object string you passed to GetPlugInObject? It is the plugin GUID, you can also use the Plug-In name V-Ray For Rhino / V-Ray For Matrix. But since the plugin name can change base off of version, the GUID is a safer bet.

@matt_newberg I’m not sure how to use GetMaterialParameterString. What value should I set for the max_value_length parameter? I tried passing an arbitrary integer value but I get the error message 'Could not convert argument 0 for call to GetMaterialParameterString'. Also, I’m wondering if I can pass use SetMaterialParameterString to change a parameter of type ‘color’ in this way: transparency.Value= " 1.000000 1.000000 1.000000 "

Command for Saving VRMAT Files

Scripting

dale (Dale Fugier) May 6, 2015, 3:47pm 2

Check this thread:

This might lead you in the right direction…

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Command for Saving VRMAT Files

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