STEP 1:
Open New FIle....
select an area aur us ko new layer bana dien

STEP 2:
foregroung aur background colours ki setting yeh set kur dien
Foreground: 7b6b32
Background: dcd08e

waisi in settings k aas paaros me rehte huwe bhi app paper ka color change kur sakte he....

STEP 3:
Filter > Render > Clouds

STEP 4:
Filter > Noise > Add Noise

STEP 5:
Filter > Blur > Gaussian Blur

abb kuch is type ki shakal ajay gi

STEP 6:
phir is layer pe right...blending options me ja k yeh settings