Another question... I'm trying to do a colored card, using:

backgroundColor = MaterialTheme.colors.primary.copy(alpha = 0.12f).compositeOverSurface()

That is supposed to do a dim version of

primary

color... but it shows plain

primary

what is

compositeOverSurface

for ? can you try removing it and try

If I remove it then the card is translucent and shadow is drawn incorrectly

compositeOverSurface

puts one color "over" surface, so if the color has alpha, it will draw a solid version, but provided by surface...

oh, so then do one thing

MaterialTheme.colors.primary.compositeOverSurface().copy(alpha = 0.12f)

check if this works for you