I would have liked to see a lot more examples like Fig. 24. Maybe you could post more in this thread? Your results are pretty fascinating.
Finally! I pushed my timetable this weekend and managed to implement all the improvements I desired - erosion caused by rivers, more rugged texturing, fixed "long finger-like islands" subduction bug and added some curvedness to plate trajectories. The results are not incredibly good but significantly better than earlier!
[attachment=8948:platec-new01.png]
Pay attention to much rougher yet far less abrupt mountain slopes. The whire pixelated ring is there to hide the not-yet-fixed subduction bug.
[attachment=8949:platec-new02.png][attachment=8950:platec-new05.png]
In the last two pictures you can see long and island chains and islands too. However, none of them looks like a "long finger". Quite the opposite - there's cool looking archs and angles here and there, much like in the real world.