I found the cause of this and it's unrelated to the workflow. The web console has a property for the max resolution that can be created which is 1280x1280 by default. To create larger renditions you need to update the Max Dimension setting in Day CQ DAM Buffered Image Cache 

Hi @anupampat, similar steps were added to the DAM Update Asset workflow, but this is in a separate workflow because we already have a lot in the DAM and need it on existing assets too.I've included the XML for the workflow below. Thanks in advance<?xml version="1.0" encoding="UTF-8"?> <jcr:root xml...

We have a workflow to automatically create static renditions for use in our app. Renditions are created for a range of image sizes from 384 to 1920 pixels wide. We do this using a "Process Thumbnails" step for each required resolution in the workflow.The image quality at higher resolutions is not as...