3. Shader depth test (cull, zwrite, ZTest)

Culling and depth testing are a process in rendering normals

Cull: By default, all the shader in unity are single-sided, and it turns off the rendering of the opposite side, if you need to use the double-sided in the development process, just turn off the cull (off)!

Zwrite: Deep Cache Zwrite is on by default, because we have a lot of models in the scene, then the relationship between the model and the model is controlled by the zwrite, so it is turned on by default, it has been introduced before.

Look directly at the effect to introduce

Cull:unity all the shader are single-sided, it is the opposite of the rendering to close off, we see what is going on, we have to create a new plane, look at it will know,

This is the effect of cull back, which is the default in unity.

When cull is fornt, the effect is:

When cull is off, the effect is:

3. Shader depth test (cull, zwrite, ZTest)