There are a few ways to make a custom texture for a car in Grand Theft Auto 5. The first way is to use the game’s editor. To start the editor, open up GTA 5 and click on the “Create” button. Then, select “Texture” from the “Type” drop-down list and click on the “Create” button. The next way is to use an online service like 4shared or Uploaded.com. To start Uploaded, open up GTA 5 and click on the “Upload” button. Then, select “Texture” from the “Type” drop-down list and click on the “Upload” button. The last way is to use a file manager like WinRAR or 7-zip. To start WinRAR, open up GTA 5 and click on the “WinRAR” button. Then, select “Texture” from the “Type” drop-down list and click on the “WinRAR” button.