This is because it would require too much processing power to make it work with smaller/thinner things.

You can change this easily in the source, you just change a number. But it will make the game unplayable.

It happens with thicker lines too if your object is traveling at a high rate of speed

I made a mountain of STNE, put a nuke inside it and the STNE flew so fast that it went through about a 3 pixel thick wall

its because of the amount of frames per second

It can be avoided if you design your stuff properly.

i have noticed that occasionally particles can even get through solid walls. very hard to do, mainly I've done it with gas

we have protons?...
do you mean photons maybe?

antb

You wrote protons ;o edit your post?