Merging Images from S3 through Composer

When attempting to merge images that are stored in an S3 bucket with Composer, you will need to apply the following steps:

Remove any access restrictions to your public facing S3 bucket.

Edit the Bucket Policy and input the following JSON:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowPublicRead",
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::image-test-cm-4894/*"
        }
    ]
}

JS

Ensure that “Block Public Access” is set to Off.
Confirm that all other settings remain as the default for the bucket:
- Object Ownership = Bucket owner enforced
- ACLs disabled
- No CORS configuration
When uploading an image, mark Grant public-read access in the Predefined ACLs section.

With these settings merges are successful when:

using the Image tag for .jpeg and .png
using the IncludePicture tag for .jpeg
This does not work using the IncludePicture tag for .png