well, i'm trying to render the sunshine directly on the skysphere, without using any textures, because i think that works much better. but i'm having problems with this. i gave the position of the sun to the shader, wich then calculates the dot product between the normal of the sphere and the position of the sun ( both vectors are being normalized before that ). but this would lighten half the sky. but i would really like to come to this result: so i tried to scale down the dot product, that it would only influence a small amount of the sky: but unfortunately this lightens no circle but some kind of weird rectangle ( with bowed edges ): perhaps i try to approach it from the wrong direction, but how can i achieve the desired effect?

i am using no texture at all. i'm just playing around with the dot product and the pixel shader.

i tried different methods, but they all ended in the same way:

return pow(Hemi, 20) * SkyDome_Aequator;
gave: this

return smoothstep(0.0f, 0.03f, Hemi - 0.97) * SkyDome_Aequator;
gave: this

i really don't know whats going wrong here -.-