Reply To: Devkoi’s blender progress

Looks cool. 

Only you seem to have the IOR of the fluid in the ‘glass’ wrong; it should actually look something like this:

If you say that water has an IOR of 1.333, then that represents the bending of the light, from air (IOR of 1) to water. The calcalution then goes something like: (4/3)/1 = 1.3333.

With fluid in a glass you get something like (with a glass IOR of 1.5, to make the calculation easier): (4/3)/(3/2) = (4/3)*(2/3) = 8/9 = 0.8888.

So there are a few different areas: at the outside of the decanter, the light goes from air to glass, at the inside, it either goes from glass to air, or from glass to fluid.

Don’t worry, almost everybody gets that wrong;)