layers

type Builder interface {
	Create() Builder
	WithID(id *uuid.UUID) Builder
	WithIndex(index uint) Builder
	WithAlpha(alpha alphas.Alpha) Builder
	WithTexture(tex textures.Texture) Builder
	Now() (Layer, error)
}

type Layer interface {
	ID() *uuid.UUID
	Index() uint
	Alpha() alphas.Alpha
	Texture() textures.Texture
}