I only really do product images. I use photoshop "elements" (although it's an old version2) and size my jpg images to 450X450 and 150X150 and upload to 3d. I then choose both the 1 image and thumbnail for each product. What's happening is, the thumbs and full size are like 60-80K. So, I end up resizing with 3Dcart editor. this cuts out quite a bit of bandwidth usage and pages load faster. Not sure what compression level in photoshop elements in order to accomplish the same thing. I think a new approach I will use is set the defaults in 3dcart to allow 450 height and 150 height (image1 and thumbnail respectively) on the images and allow for plenty of width so that 3d doesn't resize to the width prior to height, which was what was happening, making all my images different heights.
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