While editing a template in the new builder I was trying to put a fireplace made of voxel blocks on the bottom floor of a two story template. I found I could not place a voxel on the floor or one voxel higher than that. I could only place one 2 spaces above the floor. I tried to get it done with different camera angles, and even by cutting a hole in the wall. I tried to do it along any wall on the lower floor, it would not work.
(That grey voxel by those shelves is the lowest I could place a voxel block. I tried on every wall on that floor)
release-834 (x64) no mods active
Probably the same issue that sometimes happens when placing objects and the camera angle messes up how you try to place an item, but I thought I’d post anyways
edit
Started a new building from scratch and I’m not sure if this is a related issue, but placeable items that used to be able to be placed next to each other seem to have a wider collision box in the builder but not when placing the item freely. For example: Dining tables. You can plop them down in the world right up next to each other, visually making them into one big table. However when placing one down using the new builder they will not place next to each other.
See in the screenshot in this post those tables are together, that template was made when the rickety building branch was up. Since updating to the steam unstable they can’t be placed next to each other but only in the building editor.