3D Exterior Visualisation for Cardiff Projects: Why Studio Contour

3D Exterior Visualisation for Cardiff Projects: Why Studio Contour

If you are looking for exterior visualisation for a building in Cardiff, you probably already have drawings and a quiet worry that the image will look as if it could be anywhere, because a lot of architectural CGI does, with a hard blue sky, a sun that never shines like that over south Wales and stone that reads as beige plaster. We are Studio Contour, an architecture, interior design and 3D visualisation studio in New Town, Kolkata, set up to take on UK projects remotely, so here, plainly, is what a Cardiff exterior needs in order to look real and why we think a practice that designs and builds buildings is the right one to make it.

Cardiff is a particular city to render, because so much of its housing is Victorian and Edwardian terrace in grey Pennant sandstone with pale dressings and slate roofs, its waterfront around the bay mixes old dock buildings with contemporary glass and cladding, and the light over all of it comes through a soft, cool and often overcast maritime sky, so the decisions that make an image believable here are not the ones that make it believable in Kolkata. The wider process of working with a remote studio from the UK is set out in Outsourcing 3D Visualisation to Studio Contour: A Guide for UK Architects, while the detail that follows is about exteriors, facades and streetscape, which is where a Cardiff image most often succeeds or fails.

Our 3D visualisation work starts from your own drawings and specification rather than from a stock scene, and what follows is what we actually do with them, where Cardiff's particular character comes in and where a different kind of provider would serve you better than we would.

Reading the street, its planting and its detail

Most Cardiff exteriors are not of a building alone in a field but of a house, an extension or a block that has to sit inside a street people already know, so we study the photographs you send of the neighbours as carefully as the drawings of the new work. The older suburbs such as Roath, Canton, Cathays, Splott, Grangetown and Pontcanna are built largely of long terraces with a strong repeated rhythm, two storeys or sometimes three, bay windows, small front gardens behind low walls and chimney stacks marching along the ridge, and the eye reads that rhythm instantly, so if a modelled bay projects too far or a parapet sits a course higher than next door, the image feels wrong before anyone can say why. Around Cardiff Bay and Butetown, which grew out of the old docks, the context is more often converted Victorian commercial buildings in brick, stone and terracotta beside newer apartment blocks, open water and a much bigger sky, while the centre has the pale Portland stone civic buildings of Cathays Park and the covered arcades, and Llandaff feels closer to a village gathered around its cathedral, so for us the street is part of the brief rather than background to be filled in.

Planting needs the same care, because the vegetation that makes a scene feel lush in a hot climate makes a Cardiff street look like a stage set, and the believable palette here is mature street trees, the big parkland trees of Bute Park and the banks of the Taff, privet, box or laurel hedging behind low walls, moss on the shaded slope of a slate roof and grass in the joints of old paving, with sparser, wind-tolerant planting on the open waterfront. We take those cues from your photographs and any landscape drawings, keep the trees at the season chosen for the image, and add kerbs, worn pavements, parked cars and gate piers with restraint, modelling all of this context only as far as your photographs and drawings allow, which makes an image read true to the street without making it a survey.

Pennant sandstone, Bath stone, brick and Welsh slate

The material palette of older Cardiff is distinctive and fairly consistent, and getting it right does more for realism than detail anywhere else in the frame. The most characteristic stone is Pennant sandstone, a hard grey stone from the South Wales coalfield with a blue or green cast depending on the light, used on many terrace fronts and chapels and often paired with dressings in a paler, warmer limestone such as Bath stone around bays, door heads, sills and lintels, so the facade reads as a cool grey field with cream edges. Red and buff brick appear too, roofs are very often Welsh slate, and some terraces have since been rendered or painted, which a visual has to respect if the new work sits among them.

When your specification names a stone, brick or slate, we match the material to it and to your samples or photographs rather than to a generic library texture, and against a Pennant front we watch the size of the stones, the depth of the joints and the way a pale dressing catches the light, because those small relationships are what tell a local eye that the new work belongs on that street.

The light over Cardiff, and why we calibrate away from our own

Light is where most imported renders give themselves away, and Cardiff's light is about as far as it gets from what we see out of our own windows in Kolkata. The city sits on the coast of south Wales where the Severn Estuary widens towards the Bristol Channel, much of its weather arrives off the Atlantic and its skies are often layered with cloud, so for a large part of the year the light is diffuse, shadows are soft and slightly blue, contrast is low and the whole scene sits at a cooler colour temperature than the hard, warm sun of eastern India. We set the sky, the sun strength and the white balance deliberately for a northern maritime climate and then check every material under that light, since Pennant stone that looks right under a warm sun can drift towards brown or purple once the light is calibrated properly.

Rain matters as much as cloud, because Cardiff gets a good deal of it and damp darkens Pennant walls, puts a sheen on slate and paving and softens the contrast between stone and dressing, so we ask early whether the building should be shown on a dry bright day, under typical cloud or just after a shower. A marketing image of an apartment block by the water will often want a brighter broken sky with some sun on the bay, while a visual showing a neighbour what a rear extension will look like is usually more honest under the ordinary soft light the street actually gets.

We have written about why calibrated light and white balance decide whether materials read true in 3D Interior Visualisation Services in New Town Kolkata, and a grey city under a grey sky leaves very little room for a colour cast to hide, because at the end of the day a render of a Cardiff terrace is only useful if the people who walk past that terrace every morning believe it.

Real orientation, low winter sun and long summer evenings

We set sun and shadow to the property's real orientation from the north point on your site plan, which matters on Cardiff's terraced streets because the long parallel rows run in many different directions, so a sunny front in one street becomes a shaded front in the next, with the opposite terrace's shadow lying across the pavement for much of the day. At this latitude the winter sun stays low and throws long shadows even around midday, while summer evenings stay light late and give a warm raking light that suits a facade with depth, so we choose a date and time that is both flattering and true rather than inventing a sun angle the building will never see.

That matters most for the kinds of work common in the city's housing, such as a rear extension into a narrow garden, a dormer on the back slope of a slate roof or an infill along a side return, where a render with the sun in the wrong place can mislead everyone in the room. A render is a picture rather than a technical daylight study, which is a separate piece of work for a specialist, but within what a picture can do we would always rather show you an honest shadow than a dramatic one.

Who commissions exterior CGI in Cardiff, and what each one needs

Homeowners extending or remodelling a terraced or semi-detached house usually want to see the new work in the context of their own street, to make decisions with their architect and to show the neighbours what is proposed, and a small set of carefully lit stills is often all they need. Architects and designers commission visuals to win a client's sign-off, to test a material before it is specified or to support a planning application, and in that last case the architect or planning consultant makes the call on what is submitted and takes responsibility for it, while our job is to make the images faithful to the drawings they give us.

Developers and housebuilders marketing apartments or townhouses, including the waterfront kind of block found around the bay, usually need a hero image for a brochure or site hoarding, a set of supporting views and often a walkthrough that moves a buyer along the approach before the building exists, and for them consistency of light and material across every image matters as much as any single frame. Self-builders often start with a strong idea and a sketch rather than a full drawing set, and because we work from sketches as well as from 2D plans and DWG files we can build the model up alongside them as decisions are made. If your project also takes in the interior, or you want to see how the same thinking applies on another historic British street, The Interior CGI Studio for Cardiff Projects, Delivered Remotely and Architectural Visualisation for Oxford: Exterior CGI That Reads Like the Real Street cover related ground that may help you frame the brief before you send it.

Why we think an architecture practice should make your renders

Our case for Studio Contour is structural rather than a claim about talent, and it starts with who actually builds the model. We are an architecture and interior practice first, led by principal architect Sumana Kumar, and since 2014 we have delivered 330+ buildings, so the people modelling your project draw sections, specify materials and watch buildings go up. When an elevation and a plan disagree about where a bay sits, when a gutter line would not work as drawn or a cladding module does not divide evenly into the facade, we notice because resolving those things is our day job, and we raise them with you as questions rather than quietly modelling something plausible and moving on.

Sumana stays involved through the project, reviewing the model and the lighting rather than handing the work off once the brief is taken, which matters because most exterior judgement calls are architectural ones, such as how deep a window reveal should read or how a new brick sits against an old one. Our architectural visualisation uses materials matched to your specification, calibrated lighting and white balance and sun set to the real orientation, and it is delivered as photorealistic stills and, where it helps, a 3D walkthrough.

For a sense of the work we produce, Cornice House project in Gurgaon, Delhi NCR is one example of that category and Modern U-Shaped Kitchen project in Kashmir is another, and both, like the rest of our project portfolio, are projects outside the UK, so please treat them as evidence of how we model, light and finish a building rather than as pictures of Cardiff.

Working with a studio in Kolkata on a Cardiff building

You send the drawings, whether 2D plans and elevations, DWG files or sketches, together with the specification, photographs of the site and street and any mood references, we build the model and send views back for comment, then set materials, light and orientation and deliver the stills and any walkthrough. It all runs through shared files and video calls, nobody from the studio visits the site, and so the photographs you take from the angles you care about most shape what comes back.

Kolkata keeps India Standard Time, which runs four and a half hours ahead of the UK during British Summer Time and five and a half hours ahead in winter, so a Cardiff morning lands in our afternoon and there is a window each working day to walk through a model together on a call. We explain how we run these projects in How Remote Architecture Actually Works With Studio Contour, and What a Remote Client Actually Gets in a Studio Contour Drawing Set covers how review rounds are organised so that comments from you and your architect arrive in one place. Each brief is priced individually after we have gone through the drawings, because a single still of a rear extension and a walkthrough of a waterfront block are very different pieces of work.

When a different kind of provider suits you better

We would rather you choose the right provider than choose us for the wrong job, so here is where we are not the best fit. If your planning consultant needs verified views or accurate visual representations, which are basically survey-based images built on surveyed camera positions and specialist photography following a defined methodology, you need a practice that specialises in that work, because it is a distinct service we do not claim to provide. If you want someone to stand on the pavement with you, walk the site or join a design meeting or community workshop in person, a local visualisation studio in Cardiff or elsewhere in south Wales will suit you better.

The catch here is the working day itself, because if your process relies on iterating live with the renderer through your own afternoon, our shared window with the UK sits in your morning rather than across your whole day, and a nearby studio or an in-house visualiser may simply be the better structure for you. Where we fit best is a project where the drawings and specification exist, where accuracy to the design and to Cardiff's materials and light matters more than proximity, and where an architect's eye on the model is worth more to you than someone in the room, and whoever you choose, these are the points worth settling first.

Starting a Cardiff exterior with us

If you have drawings for a Cardiff building, whether a terrace extension in Roath, a new house on a tight urban plot or an apartment block near the water, send them with your specification and a few photographs of the street, tell us what the images are for and the kind of light you have in mind, and we will come back with questions and an individual quote. You can get in touch through our contact page, and Exterior CGI for Nottingham Architects and Developers, From Studio Contour is a useful companion read if you would like more background first.