Is there some way to make shadows of some IES light softer? Of course, i’m interesting how make it in Corona. For example in V-ray i know that there is “Override Shape Mode” and if you put higher value you’ll get. Do Corona has some trick like this?
If you mean the “blurriness” of the shadows cast by object lit by an IES light, then you should simply select this light, and increase its size (e.g. radius if it’s a disk light).