Make a glass cup look like it's full of water

I've been struggling to figure out a way to make a glass cup full of water, and since the cup is made of glass a plane on the top of the glasse won't really do it, so how can i go around making the glass looks like it's full of water?

• I think in order to answer this question properly we would need to know how well you want this to look. You could go really far out here by adding a fluid physics simulation and even simulate realistic light diffraction. Or you could go the quick and dirty route and just put a transparent cylinder into the glass. If the glass does not appear in a very prominent location, then that would likely be the best solution. Commented Nov 9, 2018 at 11:16
• I want it to be simple but not as simple as putting a transparent cylinder inside, in terms of how it looks just a blue color is enough for now no need for diffraction or transparency but i'll need to have fluid physics like slosh(nothing advanced just water rotating in the opposite direction of the cup or something like that) and water spilling Commented Nov 9, 2018 at 14:58
• Those last three words "and water spilling" take this from a simple visual effect we can accomplish with a number of graphics tricks straight into a non-trivial fluid simulation problem. :( Is that really a necessary part of "make a glass cup look like it's full of water," or is that a new problem you might want to ask about separately? Commented Nov 12, 2018 at 17:48
• It's a new problem that i havent given many thoughts to it yet since i want to tackle it after i'm done with this making the glass look like it's full of water with not close to reality physics because that will take a lot of effort but i also want it to look like water of course ^^ Commented Nov 15, 2018 at 15:18