Sorry, yes it does work - although it still is confusing. I suppose I like to be in complete control of said effect. From what I’ve ascertained you’ve got to select source on both the source layer and fg layer to make the effect work? That’s correct yes?
And absolutely the effect is very useful - I’ve recently branched out into 3d animation using Blender as my animation program and Vegas for compositing and effects. I found that Hitfilm Ignite can sometimes be a bit hit and miss - even though I understand the shutter angle formula, and hence I brought the Boris motion blur. I like Hitfilm for longer pauses in between movement, and Boris Motion Blur for more fast movement.
Got to say, I love Sapphire Lighting too - I will be buying more of these effects for my work in the future…what I don’t think most animators get is, you can cut render times down and add in things like volumetric lighting in post-production.