One of the earlier elements of the LEGO® Modulex system was the architectural profile brick. There were several sizes and the details are interesting to review. One style of the brick had a stud on top, an open side, and an open bottom. You can see each of the three sides has a different texture: smooth, shutters, or vertical bars. There are 2 different height versions of this style of profile element: 4 brick height and 5 brick height.
The other main type of profile brick is horizontal in orientation. There are 4-stud, 5-stud, 6-stud, and 7-stud versions. These bricks have a different texture on each side (so, two options).
There were four colors available: Black, Brown, White, and Grey. When the LEGO® Modulex direction changed from architectural rendering to plan boards, the element was no longer available. Notice that the studs have the earlier LEGO® marking (later bricks have M).
I actually really like these Pprofile bricks. I recently purchased one of those M20 paper boxes that included all of the different sizes in brown. Seems like those are more widely available than the other colours.
It = a long time since this article, so I’ll write the next:
Name holder, these comes in left & right. They have a 1:6 slope, as the higher end = 1 brick + lower end of the 1×2 1:6 slope can be used with them. But as = ×3 long its lower end = 1 brick only. They = 2×3 having ½ lower to accept clear cover.
Ah yes!! I have these! I like to use them for roofing texture!!
I thought of that. Rough roof, a lot cheaper than the normal slope bricks.