Haha.... "Linear Dodge is secret Adobe code for Add".

I always wondered which layer mode was a simple Add. Now I know.

(edit) oops, nearly forgot... thanks, Stefan!

(edit again) render from P8 pre-SR1, just for the record. Definitely no halo.
(Interesting optical illusion of a soft glow, though.)

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)