I'm unable to reproduce the issue with only entity culling and sync. Please check what mods are needed to reproduce the issue.
nvm, I will look into it.

you can see the issue? or you mean that you will look into the log and see which mods i have? i have like 200+ so if you want i can do a binary search

I can reproduce the issue with only entity culling and sync

ok

It's an issue on their end. I will open an issue on their side but I don't think there will be an update.

yeah, Ichun will never fix it, anyways thanks, i will keep using 1.0.3

mmm, is there a way to blacklist tile entities right? let me try it

Entity Culling changes the way minecraft iterates over the render chunks and checks wether or not to render an entity/tile entity. That means there can't be a blacklist because the vanilla code is never called.
(the blacklist in the config is there to blacklist entities from the skipHiddenTileEntityRendering feature)

oh, ok.
well, the last thing i can say, you know how to fix this inside Sync? i don't know much about coding, but at least i can build a dev environment with the mod, the issue here is that i have no idea what to change, and how do it, but you know which changes do? i know everything has a license, but i will just it for personal use

Wanted to tell you about that right now.
It should be enough to change 1 file:
Sync/src/main/java/me/ichun/mods/sync/client/render/TileRendererDualVertical.java

In there just replace every BlockDualVertical.renderPass with MinecraftForgeClient.getRenderPass()
And add import net.minecraftforge.client.MinecraftForgeClient; to the imports at the top of the file.

many many thanks, really, i will try it right now and report it to you.

sorry for taking much, yeah it worked, i'm going to open a pull request, just for formality