# decay-01-embers

<<you>>
Now the face_decay slot (the fragment shader). The faces are plain grey. I'd like them to look like hot metal cooling: a dull dark iron at rest, glowing orange where a face has flown far out.
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Starting AI conversation
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StackAutoSlotGuide finished (4 ms)
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InspectStackAutoSlot finished (3 ms)
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ListContentsRequest finished (220 ms)
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CaptureRenderWindowRequest finished (46 ms)
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Waiting for model
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Calculating color mapping
**Calculating color mapping**

I’m trying to work on a simple arithmetic mapping for colors, specifically using heat levels. I think I can apply a formula for orange and warm red by using separate channel powers. I’m considering a smooth heat adjustment and calculating the peak values for orange. I think I need to avoid any negative values and can use a linear interpolation guide. Overall, it seems that the arithmetic is looking fine for my purpose!

Next tool: `EditStackAutoSlot`
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EditStackAutoSlot finished (5726 ms)
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CompileKotlinRequest finished (47 ms)
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ReloadShadersRequest finished (166 ms)
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Completed
<<ai>>
<<model:{"provider":"openai","requestedModel":"gpt-6-astra","responseModel":"gpt-6-astra"}>>
_Field 4 render window 'Polytope', captured live. Describe what you actually see, then say whether it matches what was asked for._

![tool image](images/26145f4a057fd23c82f9.jpg)
<<ai>>
<<model:{"provider":"openai","requestedModel":"gpt-6-astra","responseModel":"gpt-6-astra"}>>
_after the edit — 9 moments across 4.8 s, numbered and read left to right, then down, each labelled with when it was captured; each is stack.auto.face_decay in your shader: the window, as it is drawing now, at the slot's current numbers — everything the window draws, not only this module_

![tool image](images/c7855b5f718821bdd000.png)
<<ai>>
<<model:{"provider":"openai","requestedModel":"gpt-6-astra","responseModel":"gpt-6-astra"}>>
_Post-shader-reload screenshot of the Field 4 render window, captured after a rendered frame. Inspect it against what the user asked for, together with any earlier screenshot. If the requested visual result is not achieved, edit and reload again before finalizing._

![tool image](images/4c5bc5ddd5503d0ecc82.jpg)
<<ai>>
<<model:{"provider":"openai","requestedModel":"gpt-6-astra","responseModel":"gpt-6-astra"}>>
Updated `face_decay`:

- **Dull, dark iron** when faces are home.
- **Bright orange** at full outward travel.
- Smooth cooling as each face returns, following the existing top-to-bottom wave.

Motion and opacity are unchanged—no burn-through added.

The cycle captures show orange separated faces cooling back into a dark solid. Kotlin compilation and shader reload both succeeded.