so you do the exact same thing as me when you multiply text_size and psz. that is exactly what I have stored in the repeat buffer in the screenshot above, after that I add the offset. it is the exact same thing 
I can see how changing the point size in your example changes the output size. But in my case that would mean that the images should appear in their true dimensions, which they don’t. multiplying the original width and height by a factor of 2.0, for example, only results in 4 images appearing within the same geometry window. this makes sense.
as @Chaser_Code mentioned, it seems that the point size is limited to some size, which is why my images are scaled down. This becomes obvious when experimenting with different number ranges. With gl_PointSize ranging from 0 to 10, the difference in the size of some images displayed is drastic. With anything over the unit of 10, all the image sizes seem to become stuck at some value. for example if the gl_PointSize is 300 for one point and 400 for another - the points are of the same size.
