Attached Link: http://home.worldonline.se/hellborn/linked_images/lightrig.jpg

I made a lightrig to fake radiosity and I have some questions.

The first render has softeness for all lights set to 0.00.
As i think the shadows was to sharp i tried to apply some softness and as sone as the softnes gets above 0.00 the image gets a red tone. Why ?

The last render with a softness of 45.00 has nice shadows but it's grainy. Why?

All renders were done as final renders.

The scene it's put inside is the nolightscene scene from the tutorial at www.nggali.com