So, you mean?... Please excuse me for my ignorance in that matter---The viewport should be temporarily less reactive? Or exporting a 2d black and white or grayscale render of an image in HDR format instead of png could take too long to render ? For sure this seems complex more than I can imagine. For instance I just know that in Blender the depth can be rendered in the viewport in eevee realtime using opengl or vulkan, but it's another story. This radically seems not to be based on the same basis, and even if im not a developper the idea was simply interesting in an artistic point of view .
Please let me know eventually what you think if you wish. However thanks for your explanations and for your time. Good evening.👍