Opening a ZT File

The ZT file type is primarily associated with Mental Ray.

ZT	File extension: ZT
	File type:	shadow map

What is a ZT file?

ZT files mostly belong to Mental Ray by Nvidia. A file with ZT extension is a shadow map file for 3D models created with Mental Ray, a high-performance 3D render engine developed by Nvidia. ZT files are binary files and Mental Ray uses them to accelerate shadow generation via the Mental Ray shadow-map algorithm.

How to open ZT files

You need a suitable software like Mental Ray to open a ZT file. You need a suitable software like Mental Ray from Nvidia to open a ZT file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ZT file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ZT file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ZT Text Viewer

Choose your .zt file to analyze

or drag and drop it here

Online File Viewer

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What to Do When a .ZT File Fails to Open

Because .ZT files can originate from different programs, they aren't universally openable.

1. Identify the Source: If received from a 3D artist or rendering workflow, it is likely an Nvidia Mental Ray 3D image shadow map.
2. Check the Header: Open the file in a hex viewer to inspect the first bytes:
   • Readable text or XML suggests a configuration file.
   • "PK" indicates a standard ZIP archive.
   • Specific magic bytes may confirm a proprietary 3D format.
3. Use the Original Software: You usually need the original program. Try Nvidia Mental Ray, Autodesk Maya, or 3ds Max, or ask the sender if uncertain.
4. Use this Webpage: Drag and drop your .ZT file onto this page to detect its format, extract readable metadata, and preview the contents.

ZT file format:

To view or edit ZT files you need to know the file format, because it determines how the data in this file is stored. The file format can be determined based on the file extension and the signature (the first few characters of a file). Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below is our analysis of the ZT files:

ZT is seldom used as a file extension and includes different formats for the applicable programs. The two most popular formats are as follows:

• 55% of all ZT files use ZIP compression, the ZT file contains a number of compressed files. The included one file have file names such as test.html. A little tip: If you rename the file extension to .zip and then double-click, you will see the included files and images. The files are on average 1 KB in size and range from 1.4 KB to 1.6 KB. The files contain the following words: test.html. - -.-..zt or - -.-.zt is a typical file name.
• 15% of all ZT files use the popular 7z file format. 7z is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. The average file size is 70 MB with most files being between 70 MB and 250 MB in size. Some examples of file names are Xcolta.zt or Fetlas.zt. These files are often associated with gulwna.

The remaining 30% of all ZT files are files with no common format. These files sometimes refer to grisaia. If you want to find out which format your ZT file belongs to, just click on the button "Choose your .zt file to analyze".