Thank you for the answer, Tudor
There is no problem with alpha when i import the tiffs, the window with blending options appears and in composition every image is with transparency where i need it. So i came to a conclusion that the files are ok. The problem appears when i’m replacing the original tiffs with those with alpha, in that case transparency doesn’t appear, neither do any options to interpret the files.
I’ve tried to make a single psd with some 15 images as layers in it. But AE doesn’t want to replace all 15 of them. So as far as i understand it’s not faster than alt+drag each file.
Or do you mean that it would work if those images with character were all layers in PSD from the beginning? But unfortunately all the scenes are composed from separate TIFFs already and rearranging that would take a lot of time. But i would keep you advice for future projects. Thanks