The Moiré effect

The Moiré effect as illustrated in this picture is a plague in videoprojection. It results from the interference between two superimposed grids with regular structures (click here for a more complete explanation).
Its occurence depends mainly on the relative dimension of the steps of the two grids.
In the case of videoprojection, one grid is made by the pixels of the projector, the other by the arrays of perforations in the screen, or even in some cases (on small screens in full HD or superior resolution) by the warp and weft pattern of a coarsely woven screen.
Some other factors may also influence the occurence of moiré. For instance, a setup of one screen and a projector will produce some moiré whereas the same with another projector having the same resolution will not produce moiré.
In any case, today’s projector always dispaly a grid, so the best solution is to use a projection surface not having a visible grid pattern, like our Enlightor 4K fabric.
This is the reason why our Enlightor 4K fabric is immune to moiré at any resolution up to and even beyond 4K.