Hi Sid – While you may be correct about volumetrics contributing to light bloom, it’s not an optimal way to achieve the effect. Volumetrics are very expensive in terms of rendering computation and should only be used when absolutely necessary. Bloom is far more easily achieved with post-processing, like the glare node.
Often I see students thinking computer graphics are a perfect simulation of reality. Thus if we set up a scene exactly how it is in reality, it should just work. But reality is far too complex to comprehensively simulate, and thus CG software is an approximation. While this may be disappointing, the good news is that approximations are good enough in 2025 to achieve very believable results!
