Your normals are too quantized. Simplest solution would be to use a higher precision normal buffer or take a look in Crytek's "Reaching the speed of light" - paper where they explain how to efficiently use 3 x 8 bit to store normals with good precision.;D

gonna read this for sure I switched to HDRblendable (64 bit for pc), I think it's enough and not too much, since I saw recomendation for this surface format in the past
And about squares... I looked up different deferred shading implementations and notice them there too so i think it's ok...

Also, please use Blinn-Phong. Phong is evil. ;D

Phong was intentional, since it's more accurate (I am aware it's slower). I will switch to blinn later, since from my observation people that are not into graphics don't see the difference xD

Your normals are too quantized. Simplest solution would be to use a higher precision normal buffer or take a look in Crytek's "Reaching the speed of light" - paper where they explain how to efficiently use 3 x 8 bit to store normals with good precision.;D

I switched to HDRblendable (64 bit for pc), I think it's enough and not too much, since I saw recomendation for this surface format in the past
And about squares... I looked up different deferred shading implementations and notice them there too so i think it's ok...

Also, please use Blinn-Phong. Phong is evil. ;D

Phong was intentional, since it's more accurate (I am aware it's slower). I will switch to blinn later, since from my observation people that are not into graphics don't see the difference xD