Certainly, there's nothing stopping you from building a brick (or in my case a concrete block) wall from scratch, spline by spline. As far as I'm concerned the image on the left, of one block, is the bare minimum splinage to create a convincing shape. This includes rounded corners and mortar joints that have a nice shape as seen in the render on the right.
However I think it's pretty obvious that pasteing and joining copies of this one block primitive can get really tedious, really fast. And on top of that, the number of cp's add up quickly. For example, three sections of wall adding up to 4 blocks x 36 blocks generated a 550kb .mdl file. But it can pay dividends since once I had my patch wall, I was able to use it to generate colour and bump decals that I was quite satisfied with.
First you take a section of blocks, make the faces one group and the mortar another. Then apply appropriate procedural materials that are sufficiently random that they can be tiled. Do a screen render and capture that to your paint program. This is your colour decal.
Then take another section of wall and apply gradient material that transitions from black to noisy white as you go from the base of the mortar to the tops of the block faces. Do another screen render and capture. This is your bump decal.
Tile both sets of maps to a surface and the results look like this.
Maybe not sophisticated enough for people who can afford Darktree textures but let's see you apply a procedural brick material to a curved surface.
If you're interested in building your own block decals, send me an e-mail and I'll be happy to send you both the .mdl and .mat files.
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