I’m having the same issue and using the RFWB Slider in the Tesseract theme by Tyler Moore (https://www.conttech.melissadzier.com). The slider images look great on some devices, but images are extremely pixelated (screen overlay) on others (specifically my client’s laptop and cell phone). Here are the devices it’s been tested on:
Looks horribly pixelated (screen overlay) on:
Sony Vaio Ultrabook 13.3″
Resolution set to 1920×1080
Chrome & IE Browsers
Windows 10
See specs here
Screenshot of website with RFWB Slider on this device
Screenshot of another competitor’s website on this device
Screenshot of a second competitor’s website on this device
Samsung Galaxy Note 3
See specs here
Looks good on these devices (no screen overlay):
Acer Aspire 13.3″ laptop
Resolution set to 1366×768
Chrome & IE Browsers
Windows 7
See specs here
MacBook Pro 17″
Resolution set to 1920×1200
Chrome & Firefox
Yosemite 10.10.3
See specs here
Sony Vaio VGN-FW250J
Intel? 4 Series Express Chipset Family Video Card (128MB)
Windows10
64 bit w/ Intel Core 2 Duo Processor
4 GB RAM
Chrome browser
See specs here
Dell Latitude E7240
Intel? HD Graphics Family Video card (64MB)
Running Windows 7
64 bit w/ Intel Core i7 Processor
8 GB RAM
Chrome browser
See specs here
I had originally saved the images for web at 1366×768 px @72 dpi, but found they were a bit fuzzy on my Mac, so I uploaded the full resolution photos assuming there was compression in the plugin. The original photos were approximately 3000×2000 px @ 300 dpi. This seemed to help immensely, but not on the first two devices listed.
Hoping someone shed some light on why this may be happening and provide a solution? Thanks in advance for any help!