用一个分层 PSD 做出游戏怪物的整套战斗动画：Spine 待机、攻击、受击、死亡

This is a lava salamander warrior for an RPG, facing right, holding a stone club in the front hand. Rig it and make four animations; parts that touch must stay overlapped in every frame. idle - 2 s loop: heavy breathing, the head bobs slightly on the neck, the tail sways a little. attack - about 1 s: the club arm stays almost in place and lifts only a little; the work is in the wrist - the club cocks back and snaps forward; the torso leans into the blow and the legs bend slightly. Event 'hit' at the impact. hurt - about 0.5 s: a small recoil from a blow to the chest, then a light wobble of arms and legs that settles. death - about 1.5 s, starts from the rest pose: he staggers, the knees give way one after the other, he falls backwards in phases - not as a stiff board and not as a sack; the feet stay planted, the club slips out of the hand.

idle and attack look good. Fix two things. death: in the stagger the whole body slides to the left, and by the end he sinks below the ground line - the legs and back go under y=0, and the club flies up into the air instead of falling. He must end lying on his back ON the ground line, nothing below y=0, feet where they stood; the club drops down and lands on the ground beside him. Please look at the frames of death before you answer. hurt: the club arm jerks too much on the hit - keep it to a few degrees, the recoil should come from the torso.

hurt is good now. death is still wrong, here is what I see: at 0.6-0.8 s the club arm swings up over the head - keep it down by his side. From 0.95 s the legs stay vertical and go under the ground line while the body tips over them; at 1.5 s the legs hang below the ground, the head is the lowest point on the left and the club floats in the air above him, away from the hand. Wanted end pose: he lies flat on his back along the ground line - head on the left, legs stretched out to the right, the feet near where he stood, nothing below y=0; the club lies on the ground next to the hand. One more fix in the setup pose: the fist with the club sits a bit apart from the forearm, there is a gap at the wrist - move hand_front together with the club about 14 px left and 8 px up so the fist sits on the end of the forearm.

Much better - attack and hurt are approved, don't touch them. Small tuning only. idle: right now the whole body sways as one big piece - add a slight independent sway of both arms (2-3 degrees at the shoulder, a little behind the breath) and of the hips/thighs, so it feels alive. death, small fixes, keep the rest: (1) at 0.5-0.7 s both feet lift off the ground and the club arm bends up so the club is next to the head - keep the feet on the ground until the body tips, and keep the club arm low by the side; (2) from 1.0 s to the end the club sticks straight up into the air - lay it down so at 1.5 s it rests flat on the ground next to the hand; (3) at 1.3-1.5 s the back arm and the tail hang below the ground line - lift them so they rest on the ground, nothing below y=0.

Next round of small fixes. (1) Draw order: the big arm on the left of the picture (arm_back_upper + arm_back_lower) is actually his NEAR arm - in the original art it is in front of the torso, the back thigh and the loincloth. Right now it goes behind the torso, very visible in hurt. Move both of those parts above torso, thigh_back and loincloth (still below jaw and head). (2) death 1.0-1.5 s: the club arm falls apart - the fist separates from the forearm and the forearm from the shoulder, and the club slides out of the fist so the handle lies apart from the hand. Keep that chain joined: rotate only at the joints, no translate on arm_front_upper/arm_front_lower/hand_front/club; let him keep the club in the fist and land with it, club flat on the ground. (3) death 1.15-1.5 s: the near arm's forearm with the claws sticks out horizontally into the air to the right - lay it along the body. (4) at the end the near arm and the tail still dip a bit below the ground line - lift them onto it. attack, hurt and idle are approved, don't change their motion.

Good progress: the draw order is right now, and the club arm stays in one piece with the club in the fist - keep both. Two things left in death, from about 1.1 s to the end: (1) the near arm (arm_back_upper + arm_back_lower) turned the wrong way - it now points past his head to the left and partly goes under the ground. Turn it the other way: lying on his back with the head on the left, the near arm should lie along his side pointing toward his feet (to the right), resting on the ground. The -138 degrees at the shoulder is the wrong direction; something like +40..+60 from rest should do. (2) the belly and the lower torso dip about 40 px below the ground line in the final pose - lift the whole body (fall translate) so the lowest point is on y=0. Nothing else changes.

death is almost there, only the legs in the fall and the final pose (about 0.9-1.5 s): (1) the club-side leg (thigh_front, shin_front, foot_front): lower the thigh a bit toward the other leg, as if the legs close together; foot_front must not twist on its own - keep it at roughly its rest angle relative to the shin (offset near 0) all the way. (2) the other leg (thigh_back + shin_back) ends up sticking up into the air - by the end of the animation it should come back down to a natural relaxed pose, close to its rest angles relative to the body, lying next to the first leg. Everything else stays as it is.

Last fixes in death, nothing else changes: (1) frame 0 must be exactly the rest pose - right now thigh_back starts already rotated by about +20 degrees at 0 s; make its death track start at 0 offset and keep its end pose as it is now. (2) at 0.2-0.9 s the knees bend but the hips stay where they are, so both feet lift about 70 px off the ground - lower the body together with the knee bend so the feet stay on y=0 until he tips over. (3) at 1.5 s the tail and the near upper arm (arm_back_upper) still dip about 20 px below the ground line - lift them just enough to rest on y=0.