Let me first say your theme is great and I’ve loved working with it.
My issue is that the slider image has subpar image quality when viewed on both the main page and post page. I have tweaked a couple things which have helped but it is still displayed at noticeably lower quality than the actual image.
I’ve tested all WordPress settings I’m aware of and confirmed the image hasn’t been modified by a compression plugin.
Example link below – please notice the slider image quality then click to open the actual image in lightbox to see the difference.
Thank you for your help! Hopefully, there is a bit of custom CSS I can paste in to cause the slider to display the images at their full resolution.
I hope you are well today and thank you for your question.
Could you please try regenerating thumbnails on your site using below plugin?