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Keltic on Jul, 22th - 2012, 05:03 CET
I'm trying to simulate a random, yet organized castle stone.
Ive played around with this a few time. Hardest part is making it repeatable. But anyway, basis on my travels and looking at pictures of castle walls there are three basic ways to go.
1 - cut block. these are very even and all consistent in size, eazy to do really
2 - Shale or slate. This is typically sandstone. The height of the stones is fairly consistent with the length varying a fair amount.
3 - Cobble or uncut stone. All random, the crudest of the castle walls and hardest to replicate as a material.
On the cut stone walls the joints between the blocks were normally very tight with little or no morter.
Shale used a fair amount of mortar and the cobble or rough stone used even more
I have had the best look be making the mortar darker than the stone and with the edges of the mortar area light than the center to give it some depth. GIMP as some nice tools to help with this
Alternately you could build a high poly detailed segment of wall and render it, then you the rendered image as the base for your material. Ive done the before with some success, though the image will need some tweaking to make it replicable.