Blender Blender Materials & Shading 3

Question 1

What is 'UV Unwrapping' in Blender?

Accepted Answer

Projecting a 3D mesh's surface onto a 2D coordinate space for texture mapping

Answer

UV Unwrapping flattens the 3D mesh surface into a 2D space (UV map) so 2D textures can be accurately applied to it.

Question 2

What is the purpose of 'UV Seams' in Blender?

Accepted Answer

They mark edges where the UV map is allowed to 'cut' and unfold the mesh

Answer

UV Seams (marked with Ctrl+E > Mark Seam) define where the mesh is cut open to unwrap flat, controlling UV island layout.

Question 3

In Blender, what is 'Texture Baking' used for?

Accepted Answer

Pre-cooking procedural textures into image files for use in other apps or real-time engines

Answer

Texture baking renders complex shader or lighting information (normals, AO, diffuse) into image files for optimization or export.

Question 4

What does the 'IOR' (Index of Refraction) value in Blender's Glass shader control?

Accepted Answer

How much light bends when passing through a transparent material

Answer

IOR determines how strongly light bends (refracts) when entering or exiting a material; glass is ~1.45, water ~1.33.

Question 5

What does the 'Shader to RGB' node enable in Blender (Eevee only)?

Accepted Answer

Samples a shader's color output for use in further node operations, enabling toon/non-photorealistic effects

Answer

Shader to RGB converts a shader's shading calculation into an RGB color that can be processed further, enabling cel-shading effects in Eevee.

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