Mythic Masters: second art pass with the new builder parts (after #2778 and the art PRs land) #2779

Part of #2753. It waits on merges: the builder parts PR #2778 and the three art PRs (#2763, #2762, #2768). After those land, branch from main and run a second art pass with the new builder parts. Doing it before they merge would stack PRs.

What the art workers asked for and #2778 now offers, by creature:

• Fur tufts (tuft, and spikes with rows/spread/sweep) for mammals whose backs were left smooth: Sasquatch, Yeti, Cadejo, Wampus Cat, Lobizón, Rougarou, Black Shuck, Gévaudan, Kelpie (a wet mane that hangs), Troll (moss mat), Nian, Manticore, Chimera.
• Feathers / camber / puff on wings that read as flat slabs or bat membrane: Roc, Tengu, Sphinx, Kongamato, Wolpertinger, Ropen.
• Curved horns (curve/bend, tip_base): Púca (curling, bone-coloured), Ushi-oni and Minotaur (ox horns), Kappa and Tengu (beaks), Oni and Dokkaebi (clubs thick at the end), Manticore (sting).
• ends: 1 for snouts and muzzles that came out short: Minotaur, Black Shuck, Mapinguari, Ushi-oni.
• stripes / paint: Nue (tiger legs), Tarasque (shell), Chimera (serpent tail).
• blend: seams where blobs meet bodies: Yule Cat, Ahuizotl, Chupacabra, Loch Ness Monster's humps.
• wings counts where the rig takes horns or heads for wings: Hydra, Minotaur, Curupira.

How to judge: ?gallery=0..3 (from #2774) stands 16 beasts at fight size per page. Look at every page before and after.