The filePaste utility takes a list of image files and pastes the image files together in horizontal pieces to form a larger image.
This is very useful when rendering a single large resolution image, wherein a group of machines is used for computing resources. With render region capabilities in Maya’s renderer, each machine resource can render a portion of the image. At the end of the renderings, use filePaste to concatenate the rendered images.
To use filePaste
filePaste <inputImage1> <inputImage2> <inputImage...> <outputImage>