Sector_SetCeilingScale
From ZDoom Wiki
188: Sector_SetCeilingScale (tag, u-int, u-frac, v-int, v-frac)
tag: Tag of affected sector u-int: Integral part of the horizontal scalar u-frac: Fractional part of the horizontal scalar v-int: Integral part of the vertical scalar v-frac: Fractional part of the vertical scalar
Scales the ceiling texture in the specified sector horizontally (x) and/or vertically (y). The formula for calculating a scaling value with the specials is the same as Sector_SetCeilingPanning and Sector_SetFloorPanning.

