In this tutorial, we’ll walk through the process of adding contrast to an RGB material in Unreal Engine. By the end of this guide, you should have a good understanding of how to manipulate the contrast of your textures to achieve the desired visual effect.

Step 1: Set Up Your Material

  1. Open Unreal Engine and create a new material.
    • Navigate to the Content Browser, right-click, and select Material from the Create Basic Asset menu.
  2. Name your material.
    • Give it a meaningful name that indicates its purpose, for example, M_CustomContrastMaterial.

Step 2: Import and Set Up Your Texture

  1. Import your texture.
    • If you haven’t already, import the texture you want to apply the contrast effect to. You can do this by dragging the texture file into the Content Browser.
  2. Add a Texture Sample node.
    • Open your material by double-clicking on it. In the Material Editor, right-click to bring up the context menu and search for Texture Sample. Select it to create a Texture Sample node.
  3. Assign your texture to the Texture Sample node.
    • In the Texture Sample node, click on the dropdown next to Texture and select your imported texture.

Step 3: Add the Contrast Node

  1. Add a Constant node.
    • Right-click in the Material Editor, search for Constant, and add a Constant node. This node will control the contrast value.
  2. Set the contrast value.
    • Click on the Constant node and set its value to 0.1. This value can be adjusted later to increase or decrease the contrast effect.
  3. Add a CheapContrast_RGB node.
    • Right-click again, search for CheapContrast_RGB, and add this node to your material.

Step 4: Connect the Nodes

  1. Connect the Texture Sample node to the CheapContrast_RGB node.
    • Connect the RGB output of the Texture Sample node to the In (V3) input of the CheapContrast_RGB node.
  2. Connect the Constant node to the CheapContrast_RGB node.
    • Connect the output of the Constant node to the Contrast (S) input of the CheapContrast_RGB node.
  3. Connect the CheapContrast_RGB node to the Base Color.
    • Finally, connect the Result output of the CheapContrast_RGB node to the Base Color input of the material’s output node.

Step 5: Apply and Test Your Material

  1. Save your material.
    • Click Save to apply the changes you made to the material.
  2. Apply the material to an object.
    • Drag and drop your newly created material onto an object in your scene to see the contrast effect in action.
  3. Adjust the contrast value if needed.
    • You can go back and adjust the value of the Constant node to tweak the contrast to your liking. Higher values will increase contrast, while lower values will decrease it.

Conclusion

By following these steps, you have successfully added contrast to an RGB material in Unreal Engine. This technique can be used to enhance the visual quality of your textures and achieve the desired artistic effect in your projects. Experiment with different values to find the perfect contrast setting for your materials.

Feel free to share this tutorial with others and help them learn how to manipulate contrast in their Unreal Engine projects!

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