The following visual effects are implemented with Amplified Shader Editor in Unity. They are applied when I needed a smooth transition from one material to another, as well as a smooth occurrence.
Vertical UV-Based Dissolve
The left visual effect is realized based on sampling on texture coordinates, which mimics a vertical direction blending.
Noised Interior Dissolve
The right visual effects is realized based on sampling on texture coordinates and an exterior noise texture. This could be applied to mimic burning effect or smooth disappearing visual effects.
Sphere-masked World Space Dissolve
The left visual effects is realized based on sampling on world space coordinates. It is similar to a sphere-mask visual effect in the Unreal Engine. This could be applied to make a smooth visual effect for scene occurence or switching.
The above visual effects are applied in the Building Virtual World Round 1 Project, where you can take a look at the test play video right here.