It sounds like you're looking for a 3D model of a teddy bear with a van keychain for 3D printing or CNC (computer numerical control) work, along with a base relief description. Here's a breakdown of what you may want for the project:

1. 3D Model of Teddy Bear with Van KeychainDesign Concept: A keychain featuring a cute teddy bear holding or attached to a small van. This could be a stylized or cartoonish design with soft lines, rounded edges, and a playful look. The teddy bear can be simple in shape, focusing on the outline of its face and body, while the van could be a tiny detailed model or a more minimalist representation.File Type: Common formats for 3D printing or CNC work would include STL (for 3D printing) or DXF, STEP, or IGES (for CNC work).Keychain Attachment: Include a small hole or loop on the top of the van or teddy bear for the keychain ring to be inserted.
2. CNC or 3D Print Considerations:For 3D Printing:

Material: PLA, PETG, or Resin, depending on the level of detail and finish you want.Size: Should be compact and lightweight, with a small keychain-friendly design.Print Settings: Ensure the layer height is fine enough for intricate details, especially for smaller features like the teddy bear’s face or the van's wheels.For CNC:

Material: Wood, acrylic, or metal depending on your preference.Toolpath: Create detailed toolpaths for carving the teddy bear and van, ensuring enough detail for smooth curves and shapes. You might want a shallower relief for simplicity.Depth of Cut: Keep in mind the depth for both the teddy bear and van to maintain proportions and avoid excessive cutting.

1. Base Relief Design:Relief Description: A base relief is a technique where the design stands out only slightly from the background, giving a 3D effect without fully sculpting the object. This is especially useful for CNC machining, where you want to avoid carving out full 3D shapes but still retain detail.Base Shape: For a keychain design, the base could be a simple oval, round, or rectangular plate. The teddy bear and van relief would be raised above the surface with light detailing around them (like a subtle background or border).Detail Level: Since this is a keychain, a moderate level of detail would be best—too much detail might make it difficult to see on such a small scale. For example, emphasize the shapes of the teddy bear and van, with minimal texture or background distractions.