Pixel Mapping dimmer curves

We have been running a wall of 60 Jarags as a pixel map. Is there a way to adjust the dimmer curve on individual units within a pixel ch? I am able to adjust when I use them as channels but unable to adjust when using as a pixel map ch.

 

FYI this means 1500 light globes with very slow fades are coming up all over the shop.

 

Thanks

 

D

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