RGB Image

Image textures use image files to create the texture.

The image is interpreted as being full colour even if it is a grey scale image, and therefore taking up more GPUThe GPU is responsible for displaying graphical elements on a computer display. The GPU plays a key role in the Octane rendering process as the CUDA cores are utilized during the rendering process. memory.

RGB Image Parameters:


In the example above you can see the left half of the same image when the Node type is set to Greyscale image instead of RGB Image. The RGB image on the right is interpreted as being full colour and therefore taking up more GPU memory then the Greyscale Image on the left.

An image texture is used for the parameter. The mesh must be UV mapped prior to export to properly use the Image type and to do so you can add a Texture image in the ArchiCAD Surface Settings.

IMPORTANT: Texture maps connected to ‘RGB image’, ‘alpha image’ and ‘Greyscale image’ nodes must be an actual image file in your file system, not an image in the ArchiCAD library archive (i.e.. ArchiCAD Library 22.lcf). Some GDL textures may be in the ‘lcf’ archive, so if the plugin cannot file these texture files, extract the archive as follows:

  1. ‘File → Libraries and Objects’ ‘Extract a Container’. Select whichever your current library is (which contain the tree texture map) – most likely ‘C:\Program Files\GRAPHISOFT\ArchiCAD 22\ArchiCAD Library 22\ArchiCAD Library 22.lcf’. Extract into your My Document\ArchiCAD 22 Library folder (or similar)
  1. ‘File → Libraries and Objects → Library Manager’. Click the library you just extracted in 1 and delete it (X button). Then ‘Add’ and select the folder to extracted to above (it should then display the under ‘Linked Libraries’.
  1. In the plugin, select ‘Re-convert from ArchiCAD’ for any GDL materials which had texture maps inside the lcf library.


The above is .pln file specific – so you will need to do the above on a blank document and save as a template if you want it always applied by default.