So I know with

MASKHINTS_XXX

you can add some of those generated layers where you need to. But is there a way to replace / remove ? Because AFAICT the auto-generated one is still there and it just overlays what you specify but in my case I'd like to remove some. Granted my use case is special ... I'm drawing some cells that will be "composed" by a script.

There is; I haven't tried implementing it. The

MASKHINTS_XXX

has to be used in conjunction with the

cifoutput

rules in the magic tech file. A cifoutput recipe containing, e.g.,

mask-hints PSDM

adds in all geometry coming from the property

MASKHINTS_PSDM

. The name

PSDM

in this case does not have to be a known layer name; it's just a text tag that matches between the property name and the cifoutput rule. So you could do this in the

cifoutput

sections:

templayer PSDMdrop
        mask-hints PSDMdrop

layer PSDM basePSDM,extendPSDM
        grow 185
        shrink 185
        close 265000
        mask-hints PSDM
        and-not PSDM_drop
        calma 94 20

That would allow you to specify two properties, one

MASKHINTS_PSDM

to add extra layers of

PSDM

, and one property

MASKHINTS_PSDMdrop

to remove layers of

PSDM

. I didn't implement this in the PDK tech file because it seemed over-complicated and I didn't have a real use case for it.

Oh interesting, thanks you. I've worked around it for now since that part of the design isn't super dense I had some leeway, but definitely saving this for later !