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Hahaha, I also brought box from amazon.in but it does not work good as expected, I am using regular box with the insides painted white, It works great.

The simplest of "softboxes" can be made from just hanging a translucent fabric in front of a wash light, or even a basic light bulb. All you need is to diffuse the light. My mother takes professional-level shots of her ceramic sculptures with a basic frame made of PVC with lycra stretched over the sides where she has light-sources.