Material, Texture, FX in game 3D world

Oil Surface Material



Create a oil material, set domain and blend modes as: deferral decal, translucent
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Make a oil shape image in photoshop, export it as a texture in ue
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Connect the mtl of the texture with its alpha channel to opacity
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Add water normal texture to fresnel node and connect as:
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Add Paner node lets the object spin/rotates (set speed X as 0.1, Speed Y optional)

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Add Color multiplier

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To get rid of the reflection, connect Flattennormal node to Normal:
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Set multiply value from 2 to 0.2, if want less detail pattern:
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