C4DtoA 4.2.1 uses Arnold 7.1.1.0 and is a minor feature release bringing support for Cinema 4D S26 and a number of bug fixes.

Cinema 4D S24, R25 and S26 related issues in the legacy Arnold Shader Network Editor:

  • Drag & drop nodes to the node editor does not work as expected:
    • Drag & drop an Arnold Material to create a reference. A Cinema 4D Object Operator node is created instead of an Arnold Material reference node. 
    • Drag & drop an object to create an object reference. A Cinema 4D Object Operator node is created instead of an Arnold object node. 
    • Drag & drop a Vertex Map to create a Vertex Map shader. A Cinema 4D Object Operator node is created instead of an Arnold Vertex Map shader. 
  • Ctrl + drag a shader in the node editor in S24 creates two copies instead of one. shift + drag and Shift + Alt + drag does not work.

Installation

System Requirements

  • Cinema 4D
    • R21.026 and above
    • R23.008 and above
    • S24.111 and above
    • R25.010 and above
    • S26.013 and above

Rosetta2 mode for M1 Macs is no longer supported by Cinema 4D S26. This means Arnold can not run on Apple Mac models with M series chips in Cinema 4D S26 at the moment. M1 support is planned in a future release.

  • Windows 10 or later, with the Visual Studio 2019 redistributable.
  • Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5). This is equivalent to RHEL/CentOS 7.
  • macOS 10.13 or later.
  • CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chips are supported under Rosetta 2 mode.
  • GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Ampere, Turing, Volta, Pascal, or Maxwell architecture.
  • Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.

In the driver page select "Windows Driver Type:" DCH

The cache will also need to be re-populated after installing a new Arnold version, updating to a new NVIDIA driver, or changing the hardware configuration of GPUs on the system. More information can be found here.

Enhancements

  • Support for Cinema 4D S26: Builds for Cinema 4D S26.013 are now available. (C4DTOA-2713)

Bug Fixes

  • C4DTOA-2721 - Wrong color space when writing textures from the Node Editor
  • C4DTOA-2722 - 'Unable to write file' error when exporting scene to ASS
  • C4DTOA-2723 - Contour filter buttons are missing from the toon shader UI in the Node Editor
  • C4DTOA-2727 - Sometimes imagers trigger re-render instead of an imager only update
  • C4DTOA-2728 - Image sequence with absolute path in a Node Material fails on Mac
  • C4DTOA-2730 - Some log messages are missing from the console


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