The projects i'm working on need some optimization for texture resolution, so i modified the original Photoshop export script by NathanSweet ( LayersToPNG.jsx ), gives you the ability to easily do more optimization to texture resolution.

With this version, you are able to set export scale and rotation values for a specific layer in Photoshop and maintain the size and rotation of attachments after importing to Spine, just the same as you see in Photoshop.

You can define scale and rotation by adding suffixes to layer name.
Define scale by adding suffix ' #s' to layer name.
Define rotation by adding suffix ' #r' to layer name.
ex.

• 'thisislayername #s0.5' (scale = 50%)
• 'thisislayername #s0.8 #r-12' (scale = 80%, rotation = -12 degree)

Gif demonstration...
Adding suffixes to Photoshop layer name.

Export by script.

Attachments setup correctly after Import Data in Spine.

The details of my modifications are ...

• When exporting images, scale and rotation values will automatically apply according to the parameters specified in the Photoshop layer name.
• When exporting JSON, scale and rotation values specified in the Photoshop layer name will be written as JSON data.
• Export images through Save For Web instead of Save As.
• Allow corp pixles out of canvas or not.
• Setup template attachment correctly after Import Data in Spine.
• Calculate JSON data by layer bounds instead of document size.

Script Download : https://github.com/januswow/Photoshop-Scripts/blob/master/LayersToPNG/Photoshop-LayersToPNG_JH.jsx
And the original version : https://gist.github.com/NathanSweet/c8e2f6e1d79dedd56e8c

Hope this helps.

Thanks, Nate! Besides cyan square, most of the time it are parts that not so important or parts for effects especially burry ones, to keep texture resolution less than 1024px square. And also, adjusting rotation can helps a lot sometimes.