   Phong shading in deferred
  I try to explain what happen in my engine.When i render a sphere and put a point light in the top, setting the specular power low in the equationfloat specular = pow(saturate(dot(reflect(-viewVec, normal), lightVec)), 16.0);i have a strange effect when put the camera in the bottom and look the top. With very low value of the specular power i see a corona around the sphere that disappear when i increment the specular power component.Is it right? Any mistake? How can i delete this?How can i attach a picture in this forum to explain better what happen?Thank you very much!   
  Screenshot?   ;  You have to clamp the result of the dot product to avoid negative values:max(dot(x, y), 0.0)   