So after all the crashing i have been getting i decided to just do small render crops and put it together after, so after 9 soding hours i have my first ever render in tile form, put them together and rubbish, the horizontal joining line between the top and bottom tiles is totally a different shade of colour, and no i did not have G.I TURNED ON as i had already read that G.I will cause this so thats blown that theory out of the water hasn't it, it still happens with G.I turned off, so now i want a refund as this software is not fit for purpose, how can i ever make a render.