Unity HLSL Unlit Dissolve Shader.
Can be used on both 2D or 3D assets.
Key Notes :
** Using different mask textures you can set the style of the dissolve as shown in gif..
** Can control the direction from which side dissolve should start.
** Many different effects can be created like death, spawning, disabling objects etc.
Shader can be expanded to set animation speed and amplitude, currently its values are hardcoded.
Shader Properties Video