I've been hesitant about casting rocks and starting mountain detailing, but a couple of days ago I decided to just jump right into it.
Over the summer I made about a dozen latex rock molds - a few are shown here. The idea was to give me some variety and spares in case I ruined some, which it turns out I did.
Up there is my first attempt. I used CelluClay as the casting material.
I should also note that after 6 hours the casting was still soft. I figured that was due to limited air exposure while the mold was still on. After peeling off the mold, and allowing the casting to dry with its outer surface exposed to the air, the casting was hardened by the next morning.
I also tried making a casting with Great Stuff spray foam. I squirted some in a mold, made sure the mold was evenly coated, and applied it to the mountain side.
This wasn't successful. The upshot was I was left with a gloppy mess and a ruined mold. I think this was due to little air exposure for the foam and a not thick enough coating of mold release. I may revisit this by spraying foam in a mold, letting it hardened, and then gluing the foam rock to the mountain. It's a good thing I made a few extra molds.
Anyway, foamy blues aside, it's happy days here making rocks at all hours of the day and night.
Rocksteady.
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