Which are the best texture file formats to import to UE4?

[anonymous_user_06546d51]

@;74263

You can edit every texture in gimp or photoshop, but you wont be able to keep all the layers/effects/… e.g with psd I can have different layers in my file -> then I can save and import it into the UE4 -> after some time, when I have to edit something in the texture, I can just open the psd file and then I can still edit stuff in the file (e.g delete a layer,…)

great, thanks! So i guess I can also use psd files temorary while modiying a scene and at the end replace them with jpeg files to reduce size;
I take it for granted that jpeg are smaller than psd; am also in ue4 am I correct?