# Beam & Backwall > Beam & Backwall is an independent guide to home projection, screens, room planning, connections, and practical picture setup. It helps readers translate projector terms into measured room decisions without pretending every wall is a cinema waiting for one magic setting. Beam & Backwall publishes original, long-form guides about projectors & home-cinema setup. Every article opens with a concise direct answer, is structured with clear headings and FAQs, and reflects mainstream expert consensus. ## Projector Planning - [How to Calculate Projector Throw Ratio](https://rcadisplayvu.com/calculate-projector-throw-ratio/): Calculate projector throw ratio as lens-to-screen distance divided by active image width. To find width, divide throw distance by throw ratio. - [How to Choose a Projector for Gaming](https://rcadisplayvu.com/choose-projector-for-gaming/): Choose a gaming projector by testing the exact console or computer signal, port, resolution, frame rate, HDR format, picture mode, and complete receiver… - [Choose a Projector for Your Room](https://rcadisplayvu.com/choose-projector-for-your-room/): Choose a projector by measuring the screen wall, lens-to-screen distance, seating, ceiling, ambient light, cable route, ventilation, and safe mounting… - [How to Choose Projector Screen Size](https://rcadisplayvu.com/choose-projector-screen-size/): Choose projector screen size by mocking up several active image widths and viewing them from every regular seat. - [DLP vs. LCD vs. LCoS Projectors](https://rcadisplayvu.com/dlp-lcd-lcos-projectors/): DLP projectors use micromirror imaging, while LCD and LCoS modulate light with liquid-crystal panels through transmissive or reflective designs. - [Lens Shift vs. Keystone Correction](https://rcadisplayvu.com/lens-shift-vs-keystone-correction/): Lens shift repositions the image optically within the projector's documented range, while keystone correction digitally resamples the image to counter… - [Match Projector Resolution to Your Source](https://rcadisplayvu.com/match-projector-resolution-to-source/): Match projector resolution by separating accepted input formats from native displayed resolution. - [Projector Ceiling Mount vs. Shelf](https://rcadisplayvu.com/place-projector-ceiling-or-shelf/): Choose a ceiling mount when permanent protected alignment justifies qualified structural and electrical work; choose a shelf when the lens can reach the… - [Short-Throw vs. Standard Projector](https://rcadisplayvu.com/short-throw-vs-standard-projector/): Short-throw projectors make a large image from a shorter lens distance, reducing rear-room placement and some beam crossings. - [Projector Brightness Explained](https://rcadisplayvu.com/understand-projector-brightness/): Projector brightness is light output, but the image you see also depends on screen area and material, picture mode, calibration, zoom, room light, source,… ## Screens & Room Setup - [Calibrate a Projector With Basic Patterns](https://rcadisplayvu.com/calibrate-projector-with-basic-patterns/): Calibrate a projector with basic patterns only after setting the room light, screen, source format, focus, and geometry. - [Choose a Projector Screen Material](https://rcadisplayvu.com/choose-projector-screen-material/): Choose screen material by matching gain, viewing angle, color, texture, flatness, throw direction, ambient-light structure, image size, seating, and… - [Clean a Projector Lens and Filter](https://rcadisplayvu.com/clean-projector-lens-and-filter/): Clean projector optics only through the exact user-service procedure. - [Connect a Projector to a Sound System](https://rcadisplayvu.com/connect-projector-to-sound-system/): Connect projector audio by defining the signal path first: sources through an AV receiver to the projector, sources to the projector with ARC/eARC or… - [Control Ambient Light for a Projector](https://rcadisplayvu.com/control-ambient-light-for-projector/): Control ambient light by mapping windows, fixtures, indicators, and reflections that reach the screen during real viewing hours. - [How to Focus and Align a Projector](https://rcadisplayvu.com/focus-and-align-projector-image/): Align a projector before focusing: secure projector and screen, use an internal grid, physically square the lens plane to the screen, correct rotation,… - [How to Prepare a Wall for Projection](https://rcadisplayvu.com/prepare-wall-for-projection/): Prepare a projection wall by confirming the final image size and projector geometry, then inspecting under grazing and projected light for waves, texture,… - [How to Route Projector Cables Safely](https://rcadisplayvu.com/route-projector-cables-safely/): Route projector cables by mapping power and signal separately, choosing cable rated for the bandwidth and installation environment, testing every intended… - [Troubleshoot a Dim Projector Image](https://rcadisplayvu.com/troubleshoot-dim-projector-image/): Troubleshoot a dim projector with a known source and internal menu under fixed room light. - [White vs. Gray Projector Screen](https://rcadisplayvu.com/white-vs-gray-projector-screen/): White screens are a common neutral choice in controlled light and are often sold with higher gain than gray alternatives. ## Full text for LLMs - [llms-full.txt](https://rcadisplayvu.com/llms-full.txt): every article as plain markdown in one file - Each article is also available as markdown at https://rcadisplayvu.com/.md ## Site - [About](https://rcadisplayvu.com/about/): editorial approach and standards - [All articles](https://rcadisplayvu.com/all/) - [Contact](https://rcadisplayvu.com/contact/)