Silverblade 33 a cursory look at my image fails to reveal the the explosion is composed of four different meshes.  Each one with volumetric transparency.  There are also 3 lights inside.  Whenever I put one of my explosions into a scene, the render time goes way up.  I am trying to "billboard" some of my explosions so I can get more of them into a scene.  But yes I agree that there is probably something else going on as well.

 

Agent0013 I try to use Hexagon to model any objects I need so that booleans are not necessary.  I have been actively avoiding booleans like my life depended on it since 2001.  They cause only grief and heartache as far as I am concerned.

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