How to make a sphere with low transparency in the middle and higher transparency toward the edge?

[Henborte]

like this

[neginfinity]

With shaders. Assign something like dot product between surface normal and vecotr towards camera to alpha channel.

[Henborte]

@neginfinity

With shaders. Assign something like dot product between surface normal and vecotr towards camera to alpha channel.

Obviously it can be successful, thank you.

[newjerseyrunner]

You could also fake it. A billboard should be indistinguishable from a real model.

[neoshaman]

The keywords that might help is Fresnel or ndotv also known as don’t aka like neg said a dot product between view and normal

Also the billboard can be done with texture but if you need 3d intersection and infinite resolution, bypass the texture and compute a ray intersection with a specs, extract normal and relative position, compare with depth buffer, use the screen aligned composant of the normal to extract Fresnel values without the dot.

[Antypodish]

FORCE FIELD in Unity - SHADER GRAPH

[Henborte]

@newjerseyrunner

You could also fake it. A billboard should be indistinguishable from a real model.

Do you mean to make a picture rotate with the camera?

[adamgolden]

@Henborte

Do you mean to make a picture rotate with the camera?

Yes - always faces the camera. Usually done by shader.

[Henborte]

@neoshaman

The keywords that might help is Fresnel or ndotv also known as don’t aka like neg said a dot product between view and normal

Also the billboard can be done with texture but if you need 3d intersection and infinite resolution, bypass the texture and compute a ray intersection with a specs, extract normal and relative position, compare with depth buffer, use the screen aligned composant of the normal to extract Fresnel values without the dot.

I used the pow function to modify the gradient curve and got an approximate effect.
What you said is so thorough and I learned a lot,
thank you