Figure out why Carbide and Legacy produce different images for the Blend Mode example

### Feature description

Legacy:
<img width="1668" height="2420" alt="Image" src="https://github.com/user-attachments/assets/2c871504-9b1f-4c12-9e27-1d94e2e598b6" />

Carbide:
<img width="1668" height="2420" alt="Image" src="https://github.com/user-attachments/assets/3f24af55-39b9-493b-b562-0ce7bf0ae23a" />

Note especially the additive and multiplicative pairs. 