This is currently not a supported feature, but I am not opposed to adding it. It will just require a little extra care because Ultra has a lot more options when it comes to image handling.
The main idea of the new foliage system is that multiple sub-layers can be used to randomly choose different models to place for each instance. This allows you to automatically paint a variety of objects onto the scene, without them overlapping.
Fixed rotation mouse tool acting wrong
No longer using SPIR-V for terrain shaders, as there was some inconsistent behavior between the shaders and the compiled binaries.
Fixed vertex and face tools, which could get weird results that did not align to the current mouse position.
Vertex and mouse tools now display the up/down mouse cursor when Alt key is pressed.
For now, I will keep the trenchbroom-style controls for these two tools.