Hi everyone. I need a help. I'm trying to make a bulb, but when i want to turn light it. I get this rectrangual trash. It works only in Cycles but it look like oil painting, which i don't want. Now im using ProRender from AMD and my bulb look really nice without emission but when i turn on emission i get that rectrangual garbage. BTW sorry for my english.
With emission (without any source of light)
Without emission (with are light and enviroment light)