Website layout (a question from a designer to layout designers)?

Question

HTML

A question. Made a website design. The content was placed at a width of 960 px, the layout itself was shown at a width of 1400 px (stretched the backgrounds and pictures of the slider).
The customer looks at the finished design (layout) on a laptop with a resolution of 1920px and sees that the slider images are stretched only up to 1400px (this is what the layout designer did based on my layout).
Asks me to send pictures of the slider with a width of 1920 px. I can send them, but what about the rest of the screen resolutions?
I am attaching the site layout. the developed site looks so that the slider image is not stretched to the full screen, there is a lot of empty space on the sides

Answer 1

1920 is, although not the most popular resolution at the moment, but one of the most popular. The designer must take it into account absolutely and by default (well, maybe except for some rare specific cases).
Therefore, the designer must either provide pictures covering 1920, or explicitly show what and how the typesetter should fill in the empty space on the sides.
Better yet, both, because there are users with wider monitors, so some side placeholder will be useful in any case.

Answer 2

Give the layout designer a 1920 pixel image. He will know what to do with it, so that it would look normal on pages of lower resolution.

Answer 3

I had a similar situation. I will say this, don’t worry about empty space, because not everyone has monitors under 1920px wide, the standard seems to be 1280px and 1366px. There is not so much empty space, or let the layout designer stretch it all.
The picture goes under the cover there (sort of), which means that it fills the entire slider block, no matter how big it is (stretches it in width).
Or make several sliders with different pictures, namely, make 3 - more slider pictures for different sizes and let the layout designer set up the sliders (to be honest, a crazy idea, but a working one)