Ok, as promised, a couple of my methods for creating the
base to work ontop of:
Starting with a
clouds usually on a 35% / 75% grey foreground/background so that the contrast doesn't start off too high.
Repeat filter with Ctrl+F until I get something that looks quite bland without any obvious patches.
I tend to follow this with a litte
gaussian noise at ~3% just to dirty it up a bit:
Now from here I set up the
filter>other>offset to be half my texture height and width (or just the width if I'm making a wall) and use it as a
tool to check as I go on with the rest to clean up any mismatch created by subsequent filter use.
I think it's much easier to clean up any mismatch now that there's the
Healing Brush & Patch Tool, I only have PS5 so end up messing with a rubber stamp :\
Anyway:
filter>brush strokes>spatter at default settings gets me this
turn the settings up to max:
Alternatively, a
filter>texture>texturizer using Sandstone and dropping the
relief down to about 2 and playing with the light direction to suit:
If I need something rougher, up the relief and or scale:
use a bit of caution with this becasue the texturizing can leave the odd highlight that is a bit too distinct.