Convert rad to png

What is the difference between .rad and .png?

Description: The RAD file format is associated with Radiance, a suite of programs designed for the analysis and visualization of lighting in design. It is primarily used for simulating and predicting the light levels and appearance of a space prior to construction. RAD files contain descriptions of physical materials, geometry, and lighting in a scene, allowing for highly accurate light simulation and rendering. This format is widely used by architects and designers to understand and optimize the lighting of both interior and exterior spaces.; A PNG file is an image file stored in the Portable Network Graphic (PNG) format. It contains a bitmap of indexed colors and uses lossless compression, similar to a .GIF file but without copyright limitations. PNG files are commonly used to store graphics for web images.