Tutorial: Creating a Water Shader in Unreal Engine 5.6 Using Blueprints & Material Editor

Creating a water shader in Unreal Engine 5.6 using Blueprints and the Material Editor is a great way to visually simulate water surfaces with waves, refraction, and reflections. Here’s a step-by-step tutorial on how to create a basic water shader for your game in Unreal Engine.

Step 1: Set Up the Basic Scene

1. Create a new project (if you haven’t already):
   • Open Unreal Engine 5.6 and create a New Project.
   • Make sure to select Blueprint as the project type.
   • Add a plane to your project. This can be done by opening the Add Menu, then under the Shapes sub-menu, choose ‘Plane’.
   • You will also need to add the Starter Content to your project. This can be done by opening the Add menu and under ‘Add Feature or Content Pack’, choose ‘Content’ and then ‘Starter Content’.
2. Create a new Water Surface Material:
   • Right-click in the Content Browser and choose Material.
   • Name the material M_Water.

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Step 2: Open the Material Editor

1. Double-click the M_Water material to open the Material Editor.
2. In the Material Editor, you will see a grid where you can create and connect nodes to build your material.

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Step 3: Create Water Surface Effect (Waves)

1. Shading Model:
   • In the Detail Panel, change the Shading Model to ‘Single Layer Water’.
2. Create the Material:
   • Right-click and search for the ‘Single Layer Water Material’ node.
   • Hold down the 3-key and left-click to add a Vector 3 node.
   • In the Details Panel, change the Red to 0.0033, Green to 0.0016, and Blue to 0.0011.
   • Connect the Vector 3 to the ‘Absorption Coefficients’ of the Single Layer Water Material. This means all red colors will be absorbed by the water material.
3. Refraction:
   • Hold down the 1-key and left-click to add a ‘Parameter’ node.
   • Change the Value to 1 and connect it to the Refraction input of the Water Material.
4. Opacity:
   • Hold down the 1-key and left-click to add a ‘Parameter’ node.
   • Leave the Value at Zero and connect it to the Opacity input of the Water Material.
5. Roughness:
   • Hold down the 1-key and left-click to add a ‘Parameter’ node.
   • Leave the Value at Zero and connect it to the Roughness input of the Water Material.
6. Base Color:
   • Hold down the 1-key and left-click to add a ‘Parameter’ node.
   • Leave the Value at Zero and connect it to the Base Color input of the Water Material.

Apply and Save the Material.

In the Details Panel, apply the Material to your Plane.

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Step 4: Add Waves

1. Waves:
   • Right-click and search for a Texture Sample node.
   • In the Details Panel, for the ‘Texture’, search for T_Water_N.
2. Movement:
   • For the water material to move in both the X and Y directions, duplicate the Texture Sample.
   • Right-click and search for a Panner node and connect it to the UV input of the Texture Sample.
   • Change the X Speed to 0.1.
   • Duplicate the Panner node and connect it to the second Texture Sample.
   • Change the Y Speed to 0.1.
3. Blending
   1. Right-click and add a Blend Angle Corrected Normals node.
   1. Connect both Texture Sample nodes to the Blend Angle Corrected Normals node.
   1. Connect the Blend Angle Corrected Normals node to the Normal input of the Water Material.

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Conclusion Congratulations! You’ve successfully created a basic water shader using Unreal Engine’s Material Editor. This shader includes dynamic waves, color control, transparency, reflections, and refraction, making it a solid base for realistic water effects in your game.