Tell me about a time when you had to troubleshoot a technical issue in a 3D modeling software. How has virtual reality (VR) technology impacted the 3D modeling industry in recent years?. How do you use global illumination algorithms like Path Tracing or Photon Mapping to achieve realistic lighting in a 3D scene?. Can you explain the role of render passes and compositing in the final render output of a 3D scene?. How do you create a depth of field effect in a 3D render?. What are some best practices for creating realistic reflections and refractions in a 3D scene?. How would you optimize render times for a complex 3D scene without sacrificing quality?. 
Can you explain the process of creating a physically-based rendering (PBR) material for a 3D model?. How do you use high dynamic range (HDR) images for image-based lighting in a 3D scene?. What are the key factors to consider when choosing a render engine for a 3D modeling project?. How would you set up a three-point lighting system for a 3D model?. Can you explain the difference between global illumination and ambient occlusion in 3D rendering?. What is the role of inverse kinematics in the rigging process, and how does it benefit animation?. How do you create a custom rig for a non-humanoid creature model?. What are the key considerations when creating a 3D model for a game with complex character animations?. How would you create a 3D model that can be easily posed and animated for a stop-motion project?. Can you explain the process of creating a 3D model with a proper skeleton for motion capture data?. How would you create a realistic facial rig for a 3D character model?. 
Can you explain the process of rigging a 3D character model for animation?.What are the key principles of animation that should be considered when creating a 3D model for animation?.How do you create a low-poly model from a high-poly model using mesh reduction techniques?.How do you use box modeling and edge modeling techniques to create a detailed 3D character?.Can you explain the difference between hard surface and organic modeling techniques?.What are some best practices for creating 3D models for augmented reality (AR) applications?.How would you create and apply realistic textures to a 3D model using Substance Painter?.Describe the process of UV unwrapping a 3D model in Maya.How do you optimize a 3D model for real-time rendering in a game engine like Unity or Unreal Engine?.Can you explain the process of retopologizing a model in Blender?.How would you go about creating a high-poly model in ZBrush?.
What are the key differences between Autodesk Maya and 3ds Max when it comes to 3D modeling?.
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