files/en-us/web/svg/reference/attribute/in2/index.md
The in2 attribute identifies the second input for the given filter primitive. It works exactly like the {{SVGAttr("in")}} attribute.
You can use this attribute with the following SVG elements:
For {{SVGElement("feBlend")}}, in2 defines the second input image to the blending operation.
For {{SVGElement("feComposite")}}, in2 defines the second input image to the compositing operation.
For {{SVGElement("feDisplacementMap")}}, in2 defines the second input image, which is used to displace the pixels in the image defined in the {{SVGAttr("in")}} attribute.
{{Specifications}}