Tiled TIFF files have the advantage that they can store 8-bit color components, whereas OpenEXR stores at least 16 bits. Conversion to tiled TIFF can be done using the maketx tool from the OpenImageIO library.
You can also convert all files in a scene using the V-Ray Bitmap to VRayBitmap converter script. You can convert many common image file formats to tiled OpenEXR files using the img2tiledexr tool. This allows V-Ray to load only the parts of the textures that are needed for the rendering. Tiled OpenEXR and TIFF files allow only portions of the textures to be loaded at various resolutions. This texture can also be used to efficiently load tiled OpenEXR and tiled TIFF files (tiled TIFF files usually have a.
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