The table is just brilliant. Absolutely flawless. The wood is worn enough that there is texture but not so over-detailed that it's distracting, and the light is done brilliantly.
I like the glass, too, which once again serves its function without being too ostentatious. I'm not certain about the little glint. I think that can be taken or left.
The 'blobs' of milk are really well done. But the main milk... I know you're keeping the color count deliberately low but the gradient still seems very abrupt. Maybe it would even benefit from fewer colors? And with a bit more lighting to the left (where the source seems to be.)
Also wanted to say: I really like your gallery, and you're waaaay better at this than I am, so I hope my feedback is useful anyway.
I think this is a pretty good texture of wood that definitely has an old feel to it. You're probably right that the challenge at PJ topic was a bit boring but I think the shock value of seeing spoiled milk makes up for it by making this a bit more interesting. Probably a better decision than going with milk that's a bit more fresh.
What's a bit unintuitive to me is how some of the splotches landed where they were. Even if it was tossed, I'd be amazed if the glass didn't break. Ah well, artistic effect ftw?
Not that I was ever *blessed* to have any real experience with spoiled milk, but shouldn't there be some milk around the inside of the glass? Glass has a slight electrical charge which makes water be attracted to glass, and IMO may make sense if a bit of spoiled milk was left on the walls of glass. But, that's probably just going an extra mile.
Your light source seems to be one that is placed really low to create a pretty strong light on the wood that quickly fades away with distance. I think the highlights on the milk could be more carefully placed to better reflect a light source placed to the left and close to the surface.
I also wonder if it's possible to smooth out the transition of colors on the milk.
Other than that, can't think of much else for this piece.
I'm not very experienced, so this is just an idea: You could try to do some manual dithering to make the "main blob" of milk look smoother. Apart from that I really like everything about the picture. the lighting, the glass, the worn table.
I'm not too sure if that looks like milk. If anything, it looks too strong or thick to be milk, looks more like white paint. The way the milk comes out of the glass also feels more like it's floating out of the glass rather than just dropping at the table, so you have to make it looks like there's a bit of height difference between the milk inside the glass and the milk on the table.
And ya know what's the worst ? That I was completelly serious writing it ! I wanted to sprite some "sex on the table" pixelscene with sperm dripping on da table. Mayby that's why I see something very different from milk