Scene using standard Neutral LUT
Scene using a custom bright and desaturated LUT
Simple layer layout in Photoshop to easily edit and modify your LUT
Tutorial: Lookup Table
Here is a quick tutorial on how to create and apply a LUT for your level using the Unreal Development Kit. Read more about Color Grading and Lookup Tables at UDN. You need the Neutral LUT as an uncompressed image file. I have made it available here.
#1 Start of by cleaning your current level from any post-process effects / scene effects. We want a scene only affected by the lighting.
#2 Make sure you have the Neutral LUT applied as a Color Grading Lookup Table in the World Properties.
#3 Take one or more screenshots of your level. Make sure you are in “Game View” mode when you do this. The shortcut for “Game View” is G.
#4 Load the screenshots into a Photoshop document. Get the Neutral LUT above and put it on top of your screenshot layers in Photoshop. You should have something like the image to the left.
#5 You can now start applying different adjustment layers and effects. Place all adjustment layers at the top of your layer structure so they affect both your LUT Layer and your screenshot layers. You now get a pretty accurate representation of how it will look in-game.
#6 Whenever you feel ready copy your LUT Layer. Make sure you don’t lose the adjustment effects. A good way is to select the LUT Layer and press CTRL + Shift + C. This makes a copy of your selection as if it was a flat merged image. Paste this into a new document. It should automatically be sized as a 256×16 if you did the select and copy process correctly. Save this document as an uncompress TGA 32-Bit.
#7 Import it into the UDK and make sure you set the LODGroup to TEXTUREGROUP_ColorLookupTable. Apply your LUT in the World Properties dialog and go into “Game View” mode. You should now be looking at your scene with your LUT applied correctly.
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