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        <title>Iteration 18 — Session 31 dynamic depth + Gemma bridge keyframe</title>
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        <description>Session 31 iteration 3: bridge keyframe. Addresses iter 16/17 midframe coherency loss by generating a third keyframe at t=0.5 using a Gemma-synthesized midpoint prompt ('submerged temple, coral-encrusted ruins with bioluminescent moss'). Pipeline: A→M→B with two separate TPS warps (A↔M 4 pairs, M↔B 6 pairs, each with 4 corner anchors). Piecewise in t: first half warps A→M at fraction 2t, second half warps M→B at fraction 2(t-0.5). CLIP slerp piecewise too. Midframe now resolves to a real scene instead of interpolation soup. Gotcha fixed mid-session: Gemma 4 defaults to think-mode on Ollama; content field was empty because 120-token budget was exhausted on thinking. Set think:false on text-only calls. Same A/B prompts, seed=42, cn_scale=0.5. Linear schedule (bridge handles the ambiguity, easing not needed).</description>
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