AI Questions, Answered
Real answers about the AI systems we build: answering every call, redesigning a room from a photo, and turning sketches into CAD-ready files. No fluff, written by the team that builds these systems.
Can AI convert a hand-drawn sketch into a CNC-ready DXF file?
Yes. AI can trace a hand-drawn sketch into clean vector lines and export it as a DXF file that a CNC router or laser cutter can read. The part that still needs a human step is setting the real-world scale, since a sketch alone has no fixed units until you anchor it to a known measurement.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan AI generate a floor plan from a phone photo of a room?
Yes, AI can generate a basic floor plan from a phone photo by estimating the room's walls, doors and proportions from the image. It will not be survey-accurate on its own, but it is usually close enough for early planning, and any AI-generated plan should be checked against a couple of real measurements before it is used for ordering materials.
Braňo HrivňákCo-Founder, MeltFlex SolutionsCan AI interior design keep a piece of furniture I already own?
Yes, but not by default, because most tools treat restyling a room and refurnishing it as the same action. Hand a photo to a free-form generator and it will quietly replace your specific sofa or inherited wardrobe with a generic new one, since a real, slightly worn piece is not what its training says a designed room contains. To keep an item you have to declare it: frame it clearly in the photo, name its colour and material in the prompt as a piece to leave unchanged, and design the palette around it rather than hoping it fits. Tools that preserve real objects while restyling around them, like MeltFlex AI, hold a kept piece far better than a generator that redraws the whole scene, and even then you check each render back against a photo of the real item.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan AI interior design tell me if a plant will survive where it puts it?
No, and this is the one place where an interior render can cost you something living. To an image model a plant is a shape that fills an empty corner and adds a colour the scheme was missing, so it places greenery wherever the composition needs it. The corner it reaches for most often is the one furthest from the window, which is reliably the darkest square metre in the room, and a large plant put there will drop its lower leaves within a couple of months. Three related errors come with it: renders invent species by blending leaf shapes across genera, they show plants at nursery maturity you cannot buy cheaply at that size, and they draw sealed pots with no drainage hole because a hole is not visible from the camera. Photo-based tools like MeltFlex AI keep your real window and proportions, which makes scale and quantity genuinely useful judgements. Which plant can live where is decided by pacing out the distance from your window.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan AI redesign a room from a photo without changing the actual layout?
Yes. AI room design tools can keep the real walls, windows and layout from your photo untouched while only changing the furniture, colors, flooring or style. This works because the tool maps the geometry of the room first, then generates new finishes on top of it, instead of inventing a new room from scratch.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan AI tell me how high to hang my pictures?
No. An image model has no floor plane and no scale, so the height it draws is a composition decision inside a rectangular picture, which is why AI art almost always ends up too high on a real wall. Use three numbers instead. The centre of a piece, or of a whole group treated as one rectangle, goes at about 145 to 150 cm from the floor, which is standing eye level and what galleries use. Over a sofa, console or bed, keep the bottom edge 15 to 25 cm above the furniture, and let that win when the two rules disagree. Between frames, pick one gap of 5 to 8 cm and use it everywhere, with the outer edges of the block aligned. A television sits lower, 100 to 110 cm to the centre, because you are sitting down. What AI is genuinely good for is the arrangement itself, and a restyle of your own photo, which is how MeltFlex AI works, keeps your real wall and furniture in shot. Then cut paper templates and tape them up before drilling.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan AI tell me if my sofa will fit through the door?
No. An AI render has no dimensions and no route, so it will place a three seater in a room it could never physically reach. Getting a sofa in is four measurements, not a picture. First, the clear opening: measure between the door stops with the door open, because a 762 mm internal door leaf gives roughly 71 to 73 cm of actual gap, and lifting the door off its hinges buys back about 4 to 5 cm. Second, the sofa's smallest face: take the feet off, then compare the smaller of its depth and height against that opening. Third, the turn, which is what actually defeats most deliveries: to swing a sofa from a hallway through a side door you want the hallway width plus the depth of the door reveal to be close to the sofa's length, otherwise it jams diagonally. Fourth, the narrowest point anywhere on the route, which is usually a stair turn, a newel post or a radiator sticking 6 to 10 cm off a hallway wall. Photo based tools such as MeltFlex AI at least keep your real doorway and hallway in the frame, so the design is drawn around the opening rather than around an imaginary wall. The verdict still comes from a tape measure and a cardboard mock up.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan an AI receptionist book emergency callouts after hours?
Yes. An AI receptionist can handle after-hours emergency callouts by listening for urgent keywords, capturing the property and the fault, then either booking the soonest slot or escalating straight to your on-call number. The point is that a 2am burst pipe gets actioned, not left on voicemail until Monday.
Braňo HrivňákCo-Founder, MeltFlex SolutionsCan an AI receptionist screen spam and robocalls?
Yes. An AI receptionist screens calls by answering first and checking whether there is a real caller with a real request. Silent robocalls and obvious spam get filtered out before they reach you, while genuine callers get qualified and booked. The result is that you stop losing time and focus to nuisance calls.
Matúš KolejákCo-Founder, MeltFlex SolutionsCan an AI receptionist text back a missed call?
Yes. A good AI receptionist sends an instant text to any call it cannot complete, usually within seconds, so the caller gets a reply instead of silence. The text can acknowledge the call, ask what they need, or share a booking link, which often saves the lead before they ring a competitor.
Matúš KolejákCo-Founder, MeltFlex SolutionsDoes an AI receptionist have to tell callers it's an AI?
In a growing number of US states, yes, the system has to disclose it at the start of the call. Even where it is not yet required by law, disclosing upfront is the safer default, because a caller who feels misled trusts the business less than one who was simply told.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy do curtains in AI room renders hang wrong?
Because a curtain is four measurements and a render carries none of them. Image models paint fabric as a surface with folds drawn onto it rather than a real width of cloth gathered onto a track, so three things go wrong every time: the hem lands at an arbitrary height instead of one of the four legitimate drops, the fullness comes out flat when a real curtain needs 2 to 2.5 times the track width in fabric, and the panels stack into no wall space at all when in life an open pair eats roughly a quarter to a third of the track width. The heading is usually invented too, most often a wave curtain hanging from rings, which is not a product you can buy. Tools that restyle your real photo, MeltFlex AI among them, at least keep your actual window, so the colour and fabric-weight judgement is worth something. The measurements still come from a tape measure.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy does AI delete the radiator from my room render?
Because a radiator is the ugliest object in most rooms and image models are trained to produce attractive pictures, so the model paints clean wall where the radiator was. That single deletion is expensive, because a radiator does not just occupy wall, it reserves the air in front of it. A render with the radiator gone will happily park a sofa back, a wardrobe or a bed head against the one stretch of wall that is already spoken for. The working numbers: keep furniture at least 10 to 15 cm clear of the face of a panel radiator, more like 25 to 30 cm for anything with a solid back, never sit a thermostatic valve behind a curtain or inside a cabinet because it reads trapped hot air and shuts the radiator down while the room stays cold, and treat a boxed-in radiator cover as a real loss of output rather than a styling choice. Tools that restyle your own photo, MeltFlex AI among them, keep the radiator in frame instead of inventing a wall without one, which is exactly the difference that makes the render usable. Before you believe a layout, check the render against the original photo and see whether the radiator survived.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy does AI get the mirror reflection wrong in my bathroom render?
Because an AI does not calculate a reflection, it paints something that merely looks reflection shaped. A real mirror reflects the actual room ray by ray, but a generative model has no physical world behind the glass, so it invents a plausible-looking scene: a doubled tap, a window that is not there, a reflected room that does not match the one in front of it. In a small bathroom the mirror faces the whole space, so every error is glaring. Tools that lock the room's real structure before restyling, like MeltFlex AI, keep the surfaces honest, but no tool truly computes the mirror, so treat anything inside it as decoration, never as information about your room.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy does AI interior design straighten my sloped ceiling?
Because the model has mostly seen rectangular rooms. Sloped ceilings are rare in interior photo datasets, so when an AI redesigns your attic it often defaults to the geometry it knows best and quietly replaces your slope with a vertical wall. Tools that lock the room's structure before restyling keep the angle far more often, but no tool is immune, so reject any render that flattens the slope.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy does my AI room design look brighter than my real room?
Because AI models learn light from professionally lit magazine photography, they add a brightness and warmth your window cannot deliver. Every render is closer to the room's best imaginable day than to its normal one. Anchor the AI with a photo taken in your room's true dull light, and treat any brightness the render gains beyond that photo as fiction, not a preview.
Matúš KolejákCo-Founder, MeltFlex SolutionsWhy is the rug in my AI render the wrong size?
Because an image model sizes the rug to balance the picture, not to fit your furniture. It has no floor dimensions, so it draws a rectangle that looks calm inside the frame, which in practice means a rug too small for the seating group with the sofa hovering half on and half off it. Real rugs come in three decisions: all legs on, which needs about 240 x 340 cm for a three-seater and two chairs, front legs on at roughly 200 x 300 cm, or a deliberate small rug under the coffee table alone. The rug should be wider than the sofa and should stop 20 to 45 cm short of the walls. Renders also ignore pile height, so they put 20 mm shag under doors that clear the floor by 8 to 15 mm. Tools that restyle your real photo, MeltFlex AI among them, keep your actual floor and sofa in shot, so the colour and contrast judgement is sound. Mark the rectangle in masking tape before you order.
Matúš KolejákCo-Founder, MeltFlex SolutionsWill a paint colour look like it does in the AI render?
No, and it will usually land duller and heavier than the picture. A render shows light and a wall shows pigment: your screen emits light, while paint can only reflect a fraction of whatever your windows and lamps deliver, so deep colours look luminous on a phone and flat in a hallway. The model also bakes your camera's white balance into the result and often shifts the floor and furniture colour at the same time, so you end up comparing two versions of the photograph rather than two paints. Nothing in a render corresponds to light reflectance value, undertone, sheen or the second coat, and those four decide the outcome. Use a photo-based restyle, MeltFlex AI works this way, to cut thirty colours down to five, then paint two coats on a white primed board at least 30 x 30 cm and carry it round the room across a whole day. That board is more accurate than any visualiser.
Matúš KolejákCo-Founder, MeltFlex SolutionsWill an AI render show how bright a lamp will actually be?
No, and the reason is structural rather than a bug. A 3D rendering engine traces light through a scene and produces an image as the result; an image model skips the light and paints the appearance of a lit room directly onto your photo. There is no lumen figure anywhere in that process, so the same room is painted warm and inviting whether the fitting outputs 200 lumens or 2,000. Two side effects follow: the shadows in a single render frequently disagree about where the light is, because there is no source, and the render has no sockets, switches or ceiling roses, so it will place a floor lamp four metres from the nearest outlet. Photo-based tools such as MeltFlex AI keep your real window and ceiling height, which makes fixture scale and quantity a fair judgement. Brightness is decided in lumens, colour temperature and socket positions, not in pictures.
Braňo HrivňákCo-Founder, MeltFlex SolutionsWill the furniture in an AI room design fit my narrow hallway?
Assume no until you measure. AI renders quietly widen narrow spaces, a side effect of training on wide-angle photos, and the console tables they place are often 35 to 45 cm deep. In a typical 100 cm hallway your real budget is about 20 to 25 cm of furniture depth on one wall, keeping 60 cm of clear passage and full door swings. Use the render for style, use the tape measure for fit.
Matúš KolejákCo-Founder, MeltFlex Solutions