gagnonrich

Point 1 - in my P7 (for Mac) it's the Shadow Blur Radius setting (for each light that is casting shadows).

Point 2 - in my Render Settings it's the slider bottom right labelled Post filter size and Post filter type (I generally use size 2, and Gaussian because I like the sound of it).

Point 3 - sorry, I know nothing bout that

"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)