Dreams involving family members, especially a parent like your mother, often reflect your feelings about your relationship with them or your own personal development. In your dream, your mother painting silver could symbolize her creativity or the way she brings value and beauty into your life. The act of feeding this silver into an aluminum box might represent a process of transformation or storing up potential energy or resources.

The transition from the box to your mother shooting up into thunder clouds suggests a significant change or elevation—perhaps a rise in status, creativity, or emotional intensity. Thunder clouds can symbolize powerful emotions or impending change, indicating that something significant is on the horizon in your life or in your relationship with your mother.

Overall, this dream may point to themes of transformation, creativity, and the potential for growth. It could be beneficial to reflect on your current feelings towards your mother and any changes or new beginnings you are experiencing in your life. Consider how these elements relate to your waking life and what message your subconscious might be trying to convey.