Reference
When something goes wrong
| You see | Likely cause | Fix |
|---|---|---|
| Bright pink surface | Image file not found | File › External Data › Find Missing Files, select the textures folder |
| Render is black | No active camera, lights hidden from render, or all lights off | Check the camera icons in the Outliner; Ctrl+Numpad 0 on a camera |
| An object shows in the viewport but not the render | Its render toggle (camera icon) is off | Turn the Outliner camera icon on (enable it in the Filter menu if hidden) |
| Glass looks black or grey | Too few light bounces | Render › Light Paths › Max Bounces Total 16, Transmission 16 |
| Grainy render | Too few samples for a dark scene | Lower Noise Threshold, raise Max Samples, keep Denoise on |
| Bevel or Solidify uneven | Object scale isn't 1 | Ctrl+A › Scale |
| Cloth explodes or flies away | Unapplied scale, or it starts intersecting the bench | Apply scale; start the cloth 1–2 cm above the seat; raise Quality Steps |
| Cloth passes through the seat | Seat has no Collision, or the cloth is too coarse | Add Collision to the seat; more grid subdivisions; raise Quality |
| Flickering stripes where two surfaces meet | Z-fighting | Move one surface a few millimetres, like the arena floor at −0.005 |
| Image looks stretched | Plane proportions don't match the image | Set Dimensions in the image's aspect ratio, or adjust a Mapping node |
| Bumps far too strong or masks soft | Data image set to sRGB | Set the Image Texture's Color Space to Non-Color |
| Dark patches or inside-out shading | Flipped normals | Viewport Overlays › Face Orientation (red is the back side); Edit Mode › Shift+N recalculates |
| Can't find a panel you just used | Adjust Last Operation closed | F9, or Ctrl+Z and redo |
Reference
Shortcut sheet
| Everywhere | |
|---|---|
| Ctrl+S | Save |
| Ctrl+Z · Ctrl+Shift+Z | Undo · redo |
| F3 | Search any command by name |
| F9 | Adjust Last Operation |
| F12 · Ctrl+F12 | Render image · animation |
| Space | Play / pause |
| Object Mode | |
|---|---|
| Shift+A | Add |
| G R S | Move · rotate · scale |
| Shift+D · Alt+D | Duplicate · linked duplicate |
| Ctrl+A | Apply transforms |
| Ctrl+P · Ctrl+J | Parent · join |
| M · H · X | Move to collection · hide · delete |
| N · T · Z | Sidebar · toolbar · shading pie |
| Edit Mode | |
|---|---|
| Tab | Enter / leave |
| 1 2 3 | Vertex · edge · face |
| E · I · Ctrl+R | Extrude · inset · loop cut |
| M · O | Merge · proportional editing |
| Alt+click | Select loop |
| View and camera | |
|---|---|
| Numpad 1 3 7 | Front · right · top |
| Numpad 0 | Camera view |
| Ctrl+Numpad 0 | Make selected camera active |
| Ctrl+Alt+Numpad 0 | Move camera to current view |
| I · T (Graph Editor) | Insert keyframe · interpolation |
Reference
Glossary
- Active object
- The last selected object; many commands act on it.
- Apply
- Make a transform or modifier permanent in the mesh.
- Bevel
- Rounding off a sharp edge.
- BSDF
- The maths describing how a surface scatters light. Principled BSDF is Blender's all-in-one version.
- Collision
- Physics setting that makes an object solid for cloth.
- Cycles · EEVEE
- Blender's accurate, slower renderer · its fast, real-time renderer.
- Depth of field
- Blur in front of and behind the focus point, controlled by the F-stop.
- Displacement
- Moving real geometry using a texture. Bump only fakes it with shading.
- Emission
- A surface that gives off light.
- Empty
- An invisible object used as a handle or target.
- Interpolation
- How Blender fills in values between keyframes.
- IOR
- Index of refraction: how much glass bends light (window glass is about 1.52).
- Keyframe
- A stored value at a specific frame.
- Linear values
- Blender's internal colour numbers, which differ from screen hex codes.
- Manifold
- A closed, watertight mesh: every edge is shared by exactly two faces, with no holes or internal faces.
- Mesh island
- A group of connected vertices. "One island" means every part is joined to every other part.
- Modifier
- A non-destructive operation stacked on an object.
- Node
- One building block in a material, world or other node tree.
- Non-Color
- Image setting for data (heights, masks) rather than visible colours.
- Normal
- The direction a face points; also the input for fake bumps.
- Origin
- An object's pivot point (the orange dot).
- Parent
- An object that others follow.
- Pin group
- The cloth vertices held in place during a simulation.
- Primitive
- A ready-made starting shape (cube, sphere…).
- Procedural texture
- A pattern generated by maths (Noise, Voronoi, Wave), with no image file.
- Polycount
- How many faces a model has. Game engines draw every face every frame, so game models stay inside a face budget.
- Quad
- A four-sided face; the best kind for subdivision.
- Sample
- One ray-traced measurement per pixel; more samples, less noise.
- Subsurface scattering
- Light travelling under a surface before exiting, as in skin and fruit.
- Three-point lighting
- Key, fill and rim lights around a subject.
- UV map
- The flattened layout that places an image on a 3D surface.
- Z-fighting
- Flicker when two surfaces occupy the same place.
Values in this guide were read from basketball_court.blend, clothes.blend, fruits.blend and warmobile.blend as saved in your repository, opened in Blender 5.2.2. Menu names follow Blender 5.2; if a label differs slightly in your version, F3 search finds the command by name.