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inaccurate shadow

Hey guys

i have some trouble with my shadow i created a new project and build this little scene and then i build the light (quality: production also tried high) and got that shadows :/

i hope someone can help me alt text

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asked Jan 17 '15 at 07:49 PM in Rendering

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Hi TheMrTorbi,

You'll need to increase the lightmap resolution of your floor mesh.

If the floor is a static mesh you can adjust the lightmap resolution in a power of two number to be higher. (ie. 32, 64, 128, etc).

If you're using BSP/Geometry brushes for your floor you'll need to adjust that value the opposite direction. (I know, confusing!! :) ).

To adjust BSP LM resolution you'll need to select the face you want to adjust, in the details panel on the right locate LM resolution. The default is 32. This doesn't necessarily need to be adjusted down by a power of two but I typically start by doing that. Try using 16 or 8. If you need it lower try 4 then move to single digit lower resolutions numbers like 3, 2, or 1.

You shouldn't need to go too low, but a lot of this is dependent upon the size of the bsp in question. The larger the BSP the lower that will need to go.

I hope this helps and feel free to ask questions if you need help! :)


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answered Jan 20 '15 at 04:05 PM

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Tim Hobson ♦♦ STAFF
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avatar image ElMax Feb 03 '18 at 10:15 PM

Hi Tim,

How do i change a specific mesh's/BSP's lightmap resolution? I started using Unreal Engine some days ago and i've searched everywhere but i can't find the setting

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