Inverting a Texture Shader Map Image via Script

[AlHanson]

Does anybody know a way to modify a texture’s image shader map to flag the image as Inverted? Trying to make this an accessible option on a batch import script and I can’t track down anything that controls this directly, or even indirectly via records or variables for the shader or the  bitmap on the shader. The shader records themselves only contain the basic parameters and nothing specific to the image. The image field of the shader record always seems to just be ‘4’ for every texture and I can’t figure out what that means, as it’s certainly not an image index. Any thoughts?