What is the best practice for decals when creating models with Photoshop?

[ZivoDesign]

I create some kind of bucket with photoshop 3D extrude

I then export it as OBJ and import It to dimension.

when I tried to add a decal to the bucket it was placed with half of it hidden and rotated (see image)

I know I can resize it and rotate it to fit but I would like to learn more on how to make it better when creating it on photoshop.

my problems:

1. decal not placed fully visible
2. decal not aligned to the 3D object
3. decal, although exported as JPG with 300dpi not placed in the correct size (lets say I have a cube with 20cm each side and I want to have 10cm label on it I want the decal fit the size accodring to the DPI set)

[Ussnorway]

first extrude = bugger up decals... you need a flat area and there are a few different ways to get that but if you share the model and the decal we can try to fix it for you

1. this is because you have an extrude... the ways to fix it depend on the model
2. correct... Dimension is hopless at it and that is your job
3. avoid jpeg for decals png is king... what i do is add blank space around my decals

blank space

NEVER use bmp... Dimension is dum as dog food and will crash if you try to save bmp textures to a Dn file