Hi all, this question is for those of you who have made gift bag cakes. My issue is that the "bag" looks all nice and straight and smooth UNTIL I start placing the "tissue" on top. Then gradually the weight of the "tissue" starts pressing down on the cake, which then causes wrinkling and sagging in the fondant. After the first bag cake did this, I thought I would try rolling out my fondant/gumpaste mix thinner for the next cake, so it wouldn't be as heavy, but this didn't seem to help much. What am I doing wrong? Can anyone give me some tips please?
Thank you, thank you, thank you in advance!

I don't think your tissue would do that if it is rolled paper thin. (I can't even imagine and gumpaste tissue weighing that much ) My gumpaste tissue is light as anything and has no impact on the cake.

Could you not dowel the tissued section as a separate tier?

Thanks Jan! I don't know why I didn't think of that myself!