Hello, everyone as we do lighting in 3d software like 3dsmax / VRay for ketchup or unreal engine, we require ies light profiles ( good ones) to enhance the beauty of our render, you can see clearly on the image.

What is the best way to do realistic lighting, is to replicate the real world, In the actual world, ies data files are incorporated in physical lights,

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Download all the files here

if you want to know how to use ies lights in 3dsmax follow my small video tutorial below.