FAQs
Answers to the common questions when working in Mapping Matter — keystone correction, ultra-short-throw lenses, mirrors, pixel-resolution maths, navigation hardware, and sharing. If your question isn’t here, send it through the feedback form.
How do I do keystone correction?
Section titled “How do I do keystone correction?”Mapping Matter does not have an explicit keystone tool because projection mapping itself solves the geometric correction problem: you align the projector to the surface and the geometry is correct. To visualise the projected texture on the surface without the physical beam visible, enable Projection Map in the receiving material’s Properties panel and assign the same texture you assigned to the projector — useful for client review.
Can I model an ultra-short-throw projector?
Section titled “Can I model an ultra-short-throw projector?”Yes — UST lenses are first-class. Pick a UST projector from the projector library and Mapping Matter will:
- apply the lens’s fixed optical offset (the large baked-in beam-up offset that defines a UST head) on top of any motorised shift,
- detect that you’re on a UST lens and surface a UST lens — add a fold mirror? banner in the sidebar with an Add suggested mirror button that drops in a 45° fold plate aimed at the projector’s target,
- show the beam footprint on the mirror plate so you can size it against the cone.
If the exact model isn’t in the catalogue, click + Create custom in the library overlay. The form covers everything the optics model needs — throw range, fixed optical offset (V/H plus convention), adjustable shift envelope and mode, mount slug — and the AI ghost-fill will populate them from the manufacturer + model name. See Projectors — Custom projectors.
Do I still need the “fake mirror” trick?
Section titled “Do I still need the “fake mirror” trick?”No. The mirror feature replaces the old workaround of parenting a Symmetry under an Empty Node. Use a real mirror plate for bounce, snorkel, and folded-beam configurations.
How do I calculate pixel resolution across multiple projectors?
Section titled “How do I calculate pixel resolution across multiple projectors?”The photometric analysis panel reports per-surface coverage and pixel density. For manual back-of-envelope:
effective_horizontal_pixels = N × image_width_px × (1 − blend_percent)For example, two 1920 × 1080 projectors blended at 20%: 2 × 1920 × 0.8 = 3072 effective pixels.
Do you support SpaceMouse?
Section titled “Do you support SpaceMouse?”Not yet. The viewport supports keyboard + mouse navigation and the saved views strip — see Cameras & POV.
Where are the keyboard shortcuts?
Section titled “Where are the keyboard shortcuts?”Press F1 anywhere in the editor, or open the Keyboard shortcuts page for the full list.
Where does the revision history live?
Section titled “Where does the revision history live?”Every edit creates a revision automatically. Click Revisions in the bottom Panels strip to browse or restore. See Snapshots & revisions for the full model. The legacy “last 10 opens” snapshot system has been replaced by full history.
Which browsers are supported?
Section titled “Which browsers are supported?”Recent desktop Chrome, Edge, Safari and Firefox on macOS and Windows. WebGL 2 is required. Mobile browsers are not supported.
How do I share with someone outside my organisation?
Section titled “How do I share with someone outside my organisation?”Publish a snapshot and add a link or user share — see Publish & share. Link shares can be password-protected and revoked at any time.
I get a “scene is locked by another user” notice. What now?
Section titled “I get a “scene is locked by another user” notice. What now?”Another collaborator is actively editing. Mapping Matter queues your input for a few seconds; if the lock persists, ask them to pause. See Collaboration.