MCP backend

Use when: Animation QA, contact-sheet review, motion critique, morph validation, texture flicker detection, storyboard checks, rejecting bad animation passes, pre-export animation acceptance gates.

Before the first Blender call, read ../text-to-blender/references/mcp-backends.md. Prefer official MCP for shared capabilities; preserve the selected backend for the whole task. Tool names in recipes are client/legacy examples: map them through that reference and its agent-host guide.

Animation Quality Gate

Do not accept an animation because it rendered. Accept it only after a contact sheet and failure analysis pass.

Review dimensions

1. Subject dominance — the main asset remains readable and is not overwhelmed by HUD/context.
2. Layer separation — base subject, texture state, glow, HUD, and background are separate enough to control.
3. Silhouette stability — silhouette stays constant unless deliberate morph is specified.
4. Texture coherence — no ugly full-image crossfade, crop pop, or unregistered morph.
5. Motion coherence — arcs/dots have a reason, restrained speed, and coherent easing.
6. Export truth — the final export can reproduce the effect or limitations are explicit.
7. Frame aesthetics — sampled frames look good as stills.