Originally posted by tariqrf now how could i fix that... i have seen the "number of rays" in many places not sure which one there is only one place you need to adjust that - in your render globals. and if you happen to messed with the settings anywhere else, you should know where you played with it - and higher the rays as well. according to your scene, 10 ray might be just enough - but go higher and set them to 12, especially if you use refraction as well