ericepv

Just do it as a railing. Specify the height in the 'Newels/Balusters' tab and in the 'Rail Style' tab, select 'Solid' and in the 'Wall Types' tab select a block wall.

Renderings are my specialty. PM sent

Open the DBX for each wall, in the 'Structure' tab click on 'Default Wall Top Height' in the 'Default Wall Heights' section.

If I understand you correctly, you want to use a half wall which is just a solid railing. Either use the 'Half Wall' option from the 'Build Wall' tool or just make your existing wall a railing by checking 'Railing' in the 'General' section of the DBX for the wall and then in the 'Rail Style' tab, check 'Solid' in the 'Specify railing ' section.

Here's a section view. The speaker is in red:

This is what I get. You'll need to mess around with the height of the speaker to get it where you want it.

Draw a polyline circle and convert it to a hole in the ceiling and then place the speaker in the hole. You will first need to convert the speaker to a symbol and then make it an interior fixture which will allow you to specify the height of the speaker.

There are flush Ceiling Mount Speakers in the core library: Interiors/Electronics/Home Entertainment/Speakers/Ceiling Mounted

The 'Pattern' tad allows you to select a pattern which is different from the pattern in your material. For example, if your material is a standard grid and you would like it as a herringbone, select that in the 'Pattern' tab and then click' 'Keep Pattern/Texture in Sync'.

Sounds like you need to offset the material a bit so you don't get a line in the middle of your tile. To correct this, use the 'Adjust Material Definition' tool (the rainbow tool). In the 'Texture' tab, use the 'Offset and Angle' section to move the material on the X or Y axis (click on the 'help' button at the bottom for a more detailed explanation of how to do this. You should also take a look at this article: https://www.chiefarchitect.com/support/article/KB-01006/customizing-a-library-material.html

You can open an X11 file in X15, you just can't do it the other way around.

The lower toolbar should appear once you select an object. This article may be of help https://www.chiefarchitect.com/support/article/KB-00467/troubleshooting-missing-toolbars.html

I use GIMP to manipulate images. https://www.gimp.org/ It's a free download with lot's of features and plenty of tutorials available online.

This is often caused by not having a roof over the room.

Easy mistake to make.