Okay, so, I have noticed this for a pretty long time.  Seeing that I finally have the courage to post stuff, I decided to mention this glitch; which I hope can be fixed.

So, we all know that you cannot draw onto other elements unless you use the replace tool. And you cannot draw elements on wall no matter what.  BUT, when you pause the simulation, you can draw elements over the wall, but it dissapears when you resume the sim.  Now heres the glitch: When you draw an element on a wall, with the sim. paused or running, the wall very briefly takes on the temperature of the element your drawing over it.  Now here is an example:

Say you set the simulation "WALL or VOID" border option to 'WALL'.  You then draw some stone which falls to the ground, which is WALL, and it makes a small pile.  You then draw some plasma over the stone and wall with the REPLACE tool 'off'.  Of course, nothing happens when the draw tool passes over the stone; though when it passes over the wall, the stone touching the wall instantly melts and reaches plasma temperature.

...

????????????????

I don't know if this has been mentioned before or the developers already know, but if it has, or the developers know, I'm fine with this thread being deleted or locked.

Thanks. :)