Widget to Texture

Hello there. Actualy I’m direct a new italian indie studio with more that 60 people and didn’t got time to search a solution for this.
I want to trasform a widget to a texture to apply to a surface. For rendering object I know that i can use 3D rendering texture to render objects in 3D space and trasform in texture, for example to make an animated miniature of character to insert in stats menu our think like this.
Now i want to see if someon tryed to render widgets and trasform them in 2D texture. And if he found a solution to share it with me. Thx in advace.