So this effect(if it is one)is not FULLY(Only achievable to some extent from my opinion)achievable on the PC with blitz3d?
You could always run the PC signal though a telly... it's not really down to Blitz or your PC if monitors behave differently to CRT! Sometimes adding scanlines helps the look of monitor-bound PC stuff (I'm thinking MAME here, really) but I don't know how you'd add those in Blitz without a significant overhead.