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-rw-r--r--doc/HOWTO.md11
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diff --git a/doc/HOWTO.md b/doc/HOWTO.md
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--- a/doc/HOWTO.md
+++ b/doc/HOWTO.md
@@ -86,12 +86,21 @@ make run_util_tests # Utility tests
---
-## Training
+## Training
```bash
./training/train_cnn.py --layers 3 --kernel_sizes 3,5,3 --epochs 10000 --batch_size 8 --input training/input/ --target training/output/ --checkpoint-every 1000
```
+Generate shaders from checkpoint:
+```bash
+./training/train_cnn.py --export-only training/checkpoints/checkpoint_epoch_7000.pth
+```
+
+**Note:** Kernel sizes must match shader functions:
+- 3×3 kernel → `cnn_conv3x3_7to4` (36 weights: 9 pos × 4 channels)
+- 5×5 kernel → `cnn_conv5x5_7to4` (100 weights: 25 pos × 4 channels)
+
---
## Timeline