Problem with render texture Rhino 8 and Octane plugin

Jussi_Aaltonen · May 27, 2024, 2:49pm

Surface mapping is the default mapping if the referenced texture mapping channel does not exist. And it is possible that the ON_Mesh::m_T has been set to surface mapping before Octane starts rendering. All surface render meshes have surface mapping applied by default when they’re created.

Here’s sample code for you how to access the correct mappings using the RhinoCommon 7. If you’re not planning to support sub-object materials you can skip them. That sample does not deal with WCS projected textures - the Rhino 8 sample does.

github.com

mcneel/rhino-developer-samples/blob/7/rhinocommon/cs/SampleCsCommands/SampleCsCachedTextureCoordinates.cs

using Rhino.Commands;
using Rhino.DocObjects;
using Rhino.Geometry;
using Rhino.Input.Custom;
using Rhino.Render;
using Rhino;

namespace SampleCsCommands
{
  /// <summary>
  /// This command demonstrates how to set up cached texture coordinates based on the material texture channels.
  /// </summary>
  public class SampleCsCachedTextureCoordinates : Command
  {
    public override string EnglishName => "SampleCsCachedTextureCoordinates";

    protected override Result RunCommand(RhinoDoc doc, RunMode mode)
    {
      var go = new GetObject();
      go.SetCommandPrompt("Select objects");

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We are currently investigating the possibility of making Rhino 8 update the ON_Mesh::m_T array. That is because there are so many users having these issues and we’ve been too slow providing 3rd party developers with support how to fix this.

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Problem with render texture Rhino 8 and Octane plugin

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