Maris3D 0.1.1

Install in one command (no clone needed):

• macOS / Linux: curl -fsSL https://raw.githubusercontent.com/slm4apps/maris3d/main/install.sh | sh
• Windows (PowerShell): powershell -ExecutionPolicy ByPass -c "irm https://raw.githubusercontent.com/slm4apps/maris3d/main/install.ps1 | iex"

Changes:

• One-line installers for macOS, Linux and Windows.
• Edit keeps to what the sentence names: "Make the roof red." paints the roof, not the whole scene, and leaves the camera and lights alone.
• Plan first places things on the ground (z = 0), not 1 m under it, when Blender's default cube is in the scene.
• Model downloads work on a Python without its own certificate store (python.org Python on macOS).
• maris3d --version; release_check reports PENDING, not FAIL, in a clone without the weights.
• README reworked.

Same model files as 0.1.0: slm4apps/Maris3D-Blender.