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lightmass show wierd results with adjacent static meshes

hi actually i was testing some lighting and i get this behavior: i simply open a new third person blueprint project and used the ground mesh and divide it by three in order to make a ceiling for the example map. every thing was okay until i got my lightmass built and this is the result: alt text alt text lightmass settings are shown in the right and the left of images. do why is this happening? is it related for lightmass grid or i have lost some principle or settings? sorry for my wierd english. :) thx

Product Version: UE 4.20
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asked Sep 29 '18 at 08:08 PM in Rendering

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Moftkhor
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Hi!

Meshes are calculated separately during light build! What you see here is shading differences! You can tune your lightmass settings to get rid of those: set 0.15 for scale and 0.6 for smoothess and they will be gone! ;)

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answered Sep 29 '18 at 08:46 PM

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Makigirl
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avatar image Moftkhor Sep 29 '18 at 08:58 PM

thx it worked, but this will increase lightmass calculating time dramatically, is there any other way to keep the calculate time low and avoid the effect?

avatar image Makigirl Sep 29 '18 at 09:09 PM

Yes it does increase build time!! ...if you don't need hyper resolution lightmaps (=archviz) then just use 1 mesh / wall and don't use modular pieces!

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