Glassblowing in RS 2007?

[seatalon143 2]

I have not been able to figure this out.

In OSRS, you took sand and cooked seaweed to a furnace and *bam* molten glass.  In 07 RS, nothing happens. I can only find metal options. If I need to use OSRS, okay I guess, but I'm hoping not. Anyone have any insight?

[ChathMurrpau 286]

By 07 RS I'm gonna assume you mean RS3 after the rework. Go to any furnace and choose one of the "Casting Metals" below the ores in the left window (doesn't matter which you click). Scroll ALLLLLLLL the way to the bottom of the middle one and you'll find the molten glass option. Included picture for clarity. Hope this helps =D