.GTX

.GTX file extension

This is the basic program to work with .GTX extension

Genetica Viewer

Genetica Viewer Genetica seamless texture

Genetica Viewer is a free application for rendering seamless textures that are saved in the Genetica texture format (GTX). These textures have a number of advantages over traditional bitmapped textures, including embedded effect maps and resolution independence... (more)

The program works with the following extensions: gtx

.GTX extension is also supported by the following programs:

Genetica

Genetica Genetica seamless texture

This is a textures, animations, and HDRI environment maps editor.
GhostTyperXML

GhostTyperXML GhostTyper Document

GhostTyperXML v3 offers autotext function in all applications.
Genetica Basic

Genetica Basic Genetica image

Genetica Basic is a very advanced and powerful graphics texture editor.