# Fresnel, Panner, Pixel Depth Offset, UV Multiplier

### [Fresnel ](https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/HowTo/Fresnel/)

You can add a Fresnel effect on top of your Base Color or Emissive Materials, and control their force, opacity, and if they affect the center of the mesh. 

![Red Fresnel effect over a blue sphere](/files/6pLKEOJ0RiS0g5Gy7VI1)

Fresnel Values offers the following settings : 

* Exponent

*How strong the fresnel effect will be*

* Center Value

*If a value is set, will use that value as the base for the center of the mesh (Before applying the Fresnel)*

* Opacity

*Opacity of the Fresnel.*

You can also use Normal maps and/or use a Mask with them (Separated from the Global Settings.)

### Panner

It's possible to use a panner to move the texture in a specified direction with the Speed X and Y values.

Some nodes may have their own panner, independant of the Global panner.

You can combine the UV Breaking features, Triplanar and Panner to create a special effect !

### Pixel Depth Offset

Pixel depth offset is a setting allowing you to blend the object with another material. 

However, it will create visual glitches if "Cast Shadows" isn't disabled on the mesh it's applied on !

![Strength 50
Cast Shadows Disabled](/files/7hblc8reUgqp2REatXhU)

### UV Multiplier

Multiplies the UVs on the X or Y axis.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://sylvl.gitbook.io/untitled/guide/fresnel-panner-pixel-depth-offset-uv-multiplier.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.