Upper-case tags usually assume the tile coordinates start from 1, whereas lower-case tags assume the tiles start from 0. For example, the UV tile x (1,1) has coordinates (0,0), the UV tile x (2,1) has coordinates (1,0) and so on.

In the following section, we assume that each UV tile has unique integer coordinates (u,v) based on the integer part of the UVs inside it. This is done by using special tags in the file name, which are replaced at render time with a particular string based on the UVs of the current shading point. There are several ways to specify the correct file for each tile, and in each case, a different format for the file name is used in the File node. For example, one file may be used for UVs in the range x (1,1), another file may be used for UVs in x (2,1) and so on. Some modeling applications allow you to specify a different bitmap file for different portions of a model based on the UV coordinates of that model. However, they will work correctly with the V-Ray automatic transfer of assets for distributed rendering. Note: Textures that have any of the render-time tags listed below, will not be resolved properly by the 3ds Max Asset Tracker (i.e. VRayBitmap allows the use of named tags enclosed with the characters, which are replaced at render time with other strings. Tags and Environment Variables in Bitmap Names This means that tiled 8-bit TIFF textures are smaller on the disk and take up less RAM while rendering. 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.

Pixplant and vray