How to make a Sims 4 lamp that lights correctly

Can you post the .package and .blend that is giving touble to you? We can take a look into it

Hello,

first I'd like to thank orangemittens for this amazing tutorial. I followed it from A to Z, with a simple shape as a new mesh (a sphere) just to fully understand how things work, but everytime I start to import each lod in S4S a weird shadow appears on my ceiling light.

Here's what appears on every LOD:


And here's what appears on every Shadow LOD:


I don't think it comes from the vertex paint as I painted and painted again every single face with a light grey colour. I also picked the cloud ceiling light that doesn't contain any transparency thing as a base mesh so it's not the transparency problem. I also intended to follow the "How to fix every type of Sims 4 object shadow" tutorial but there isn't any shadow to a ceiling light so I'm a bit lost. I do believe it's a simple step I missed but I tried to do this simple sphere light so many times I'm not sure of anything anymore haha.

I hope someone can help me with this, thanks!

Thanks for your reply Memphis84. I only have a direct access to the texture in S4S with this basegame mesh so I didn't modify nor replace the normal map. Here's a link to my package file.

Hi again, so I followed this tutorial and the shadows still appear the exact same way. Do you have any other idea of what could be the issue? Here's a link for my new package, updated with the blank specular and bump maps.

Thanks a lot for your help Memphis84   I think the problem comes from the missing shadow group for the ceiling, sadly this is missing for every ceiling light basegame mesh I export in Blender. So here's a link to the basegame mesh unmodified, freshly exported. You can see that the s4studio_mesh_0 is the ceiling light itself, and that there aren't any shadow group/mesh. No s4studio_mesh_1 too. My shadow groups work for every other object exported though, here's a lamp basegame mesh, with the two groups/meshes. Everything seems to be normal for this one and all the other type of lights that aren't ceiling ones.

I didn't bake a shadow as for some reasons I didn't think I had to do it without the basegame shadow mesh. I simply thought at first that ceiling lights didn't have any shadow mesh and that I didn't need to do anything about the shadow. So here's my new package with the baked mesh, following this tutorial (without the part about the shadow plane/mesh).

I will try to modify my specular file also, as it may be the issue. And I just tried to rotate the sphere in blender and import it again in S4S, but the shadow appears at the exact same place.

You don't have to be sorry, you helped me figuring out what wasn't the problem. Thanks for doing it on your own also, I can say that the problem is universal. I'm going to create a thread in the help section to stop polluting this thread haha

Since you tried it yourself and got the same result, I thought about redoing it with another shape to see if the problem is about the mesh itself, and turns out it probably is:


There isn't any shadow on the cube. The problem is either with how we create the sphere mesh, either it's a more global thing with sphere meshes not interacting very well with the light object in the Sims 4 and we need to do something more?

Anyway thanks for helping me Memphis84! I really appreciate it