This is the original screencap that I chose:
And this is how the pumpkin came out (unretouched photo!):
This is what I did with it to make the screencap a template, playing with the saturation and brightness in Photoshop:
Here's the finished pumpkin in normal light, without being lit from within:
And, again, the finished product.
I leveled up this year in pumpkin carving; this is the first time I've gone for pumpkin scraping in different levels of layers, without cutting all the way through anywhere. It was a trickier learning curve, but seeing the results, it's darned rewarding, and I'm going to keep at this technique.