"F-Scapes" was the last program I wrote for the ZX81, during a short stint as an accountant's assistant (!) in 1988. Would you believe pull-down windows, 3-D rendering, 2-D topo maps, even 3-D fractals? Believe it! It's really quite something, if I say so myself, and I strongly encourage you to read the extensive documentation either in Text-format or in Write-format (also readable with MS Word). The documentation is also included in the main ZIP file as FS-DOCx.P, which are ASCII "Big REMs" intended for reading using ZX-TERM-80. Also included are FS-FIGx.P, the figures referenced in the documentation. Before running (either on a real machine or on an emulator) POKE 16389,255 then NEW, and only then LOAD "FSCAPES.P". The program really does need a full 48K of dynamic RAM!
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