Unity - Scripting API: Graphics.Blit

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Declaration

public static void Blit(Texture source, Material mat, int pass = -1);

Declaration

public static void Blit(Texture source, Material mat, int pass, int destDepthSlice);

Declaration

public static void Blit(Texture source, RenderTexture dest, int sourceDepthSlice, int destDepthSlice);

Parameters

Parameter	Description
source	The source texture.
dest	The destination RenderTexture or GraphicsTexture.
mat	The material to use. If you don't provide `mat`, Unity uses a default material.
pass	If the value is `-1`, Unity draws all the passes in `mat`. Otherwise, Unity draws only the pass you set `pass` to. The default value is `-1`.
scale	The scale to apply.
offset	The offset to apply.
sourceDepthSlice	The element in the source texture to copy from, for example the texture in a texture array. You can't use `sourceDepthSlice` to specify a face in a Cubemap.
destDepthSlice	The element in the destination texture to copy from, for example the texture in a texture array. You can't use `destDepthSlice` to specify a face in a Cubemap.

Description

Uses a shader to copy the pixel data from a texture into a render target.

This method copies pixel data from a texture on the GPU to a render texture or graphics texture on the GPU. This is one of the fastest ways to copy a texture.

When you use Graphics.Blit, Unity does the following:

Sets the active render target to the dest texture. (See RenderTexture.active and GraphicsTexture.active.)
Passes source to the mat material as the _MainTex property.
Uses the material's shader to draw a full-screen surface from the source texture to the dest texture.

Set dest to null. Unity now uses Camera.main.targetTexture as the destination texture.
Set the Camera.targetTexture property of Camera.main to null.