Blend Layer Vertical Displacement
blend-displace-y
Sets how far a displacement map code of 0 moves the blend layer vertically. The default is 0.
The value is in pixels, up to 999. On a still output that honors dpr, the value is multiplied by it; dpr does not apply to video output. It has no effect without blend-displace.
Use blend-displace-y[N] to target a specific blend layer, where N is 0–3. Layer 0 is either the bare blend-displace-y or blend-displace-y[0]; if both are supplied, the bare name wins.