txd to jpeg conversion pretty much describes export of RenderWare textures to JPEG format, something that is doable, but only with a limited set of specialized tools and utilities, for example the Magic.TXD.
Often used for game modding purposes and so if you need help with something like this, it might be best to reach out to the modding community of your game. You can also find many guides and tutorials about how to work with TXD files on YouTube.
Updated: August 14, 2023