I noticed that shadows don’t work properly on the following set of 3d models. Any suggestions why is this happening? 
Partial shadows.3dm (1.6 MB)
Hi @Rhino_Bulgaria
The objects are set to not cast and receive shadows in the properties panel
HTH, Jakob
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Wow, no idea why those walls were excluded from the shadows, since they are made together with the other walls. Anyway, thank you for the quick response! Your suggestion fixed the issue.