https://sims4studio.com/thread/701/beginners-recolor-tutorial-using-samanthagump?page=1

This is a basic tutorial for beginners, learning to recolor and retexture a top, using Sims 4 Studio (Flora version), Paint Shop Pro (X6 version), and Gimp (2 version). Paint Shop Pro is not a free program, but if you are serious about making CC, it is a good program to go with, and much cheaper than Photoshop. Paint Shop Pro offers a free trial, so you can download it and try it.

Sims 4 Studio (Flora) - Download Gimp 2.8 - Download Paint Shop Pro - Download (The current version is 7, and I am using 6, but it shouldn't make a difference for this tutorial.)

This is what we will be making today:

Part I -Importing the texture file to Paint Shop Pro-

Let's get started! Open Sims 4 Studio.

  1. Make a Creator Name. You can't get to the next screen until you choose a creator name. I use my real name, because that's just how I roll, but you can use whatever you'd like. =) 2. Click "Create CAS Standalone." 3. Click the big "Create Recolor" button.

  1. Select Gender: Female, Age: Adult, and Part Type: Clothing Top, from the top left tabs. 5. Scroll down until you get to this off the should top, and select it. 6. Click "Next" in the bottom right corner.

  1. Name your .package file. This is the file that essentially is your CC, the one you need in your game. For now, save it where ever you'd like. 8. Click "Save."

  1. You will notice that along with the shirt, the model automatically has underwear on. Ironically, adding a tank top strap, like the one you see now, is part of what we're doing with this tutorial. In the regular game, you would not see the strap displayed right now. Click the "Export Texture" button.

  1. Give your shirt a name. This will not show up in the game. 11. Save your file.

  1. Open up Gimp. It should open as 2 windows. Don't worry about the toolbar window, we won't even need it. The only reason we're using gimp is to convert the dds file to a png. Paint Shop Pro, does not open dds files, and even with trying plug ins, I have had trouble with it, so we will use Gimp. 13. Open the folder you saved your shirt texture to, that is, the dds file. Drag it into Gimp.