Strange Iray Material Effects?

Deke

I'm experimenting with the Pick-em up truck and when I set to render in Iray with "dome and sphere" it seems the whole truck is glowing.  Even when I turn off the distant light it's really bright with hardly any shadows. I applied the Iray Uber Base material. Does Uber Base make things emissive?

jestmart

Iray Uber has an emmissive chnnel, make the color is set to black to turn it off.