Slicing Material Effect in Unreal Editor

This tutorial uses the local spatial value of a material rather than its absolute world position to determine where to slice.

You will create a slice effect by first setting up an emissive node graph to make a solid material, then using the mesh local space and a material function to determine where the slice will happen on the mesh.

Creating the Emissive Node Graph

1. Select the material root node and check the Two Sided option in the Details panel.

2. Open the Blend Mode dropdown menu and select Masked.

3. Add the following nodes to your copied material by right-clicking in the node graph and searching for the specified name:

   1. 3 X Constant node
   2. 2 X Constant 3Vector Expression node
   3. 2 X Clamp node
   4. Append3Vector node
   5. WorldPosition node
   6. Subtract node
   7. Dot Product node
   8. Multiply node
   9. Linear Interpolate node
   10. TwoSidedSign node

4. Double-click the first Constant3Vector node and add an exterior color to the material.

5. Drag off the white pin from the first Constant3Vector node and plug into the Base Color input on the material root node.

6. Drag off the pin of the first Constant node and plug into the Roughness input on the material root node and change the value to 0.75.