from the link the flying monk posted take the top part of the code and put it into a custom node like this the result will most likely look different to what it looks like in photoshop due to the hdr tonemapper and other adjustments udk does to the textures. you could also reconstruct it with the nodes already in udk but…
UDK comes pre-packed with material functions for various blending modes including overlay. In the mat editor, in the Material Function Library panel (should be on the right under the Material Expressions panel by default), drag in the Blend_Overlay node.
Hi all! I am trying to mimic the overlay function in 3D Max in the UDK material editor. Any tips on what node I should use? Use: Trying to add a grunge map to overlay a base material. * it needs to act like overlay function: add and multiply haven't produced the correct effect.
Hey Zazerzs, This might be what your looking for; http://tech-artists.org/wiki/Blending_functions From memory, I found that (Base Map * 2) * Overlay gave similar results if you want something simple.