Ben Johnson: Modern Perspectives | Exhibitions | The National Gallery, London

I'm Ben Johnson, I'm a painter and I've been using architecture as my subject matter and starting point for my paintings for maybe 40 years now. But approximately 15 years ago I decided to move from individual pieces of architecture to the broader view and cityscapes. Canaletto had always been in the background but the painting that I'm making at the moment, which is the view from the roof of the National Gallery, has really been 15 years in the making. I was invited by a curator to look at the view from the roof of the National Gallery and I spent probably 10 days going up looking around different weather conditions and it is an extraordinary view, it's a very privileged and special view. But all the time I was up there and all the time I was making drawings or taking photographs I kept on going back to the same spot and from this spot I kept on thinking there's something underlying this view that reminds me of something not far from here and I went down into the gallery and I looked at the stone mason's yard and I started to analyse the geometry of the Canaletto painting and I analysed the geometry of my photographs and there was an extraordinary set of coincidences happening. What I did is to take the postcard of the Canaletto and I started to put the geometry, the underlying structure, the bones of the painting for me. I took my photograph that I'd taken or a series of photographs which I stitched together of the view from just over the Sainsbury wing and I started to get this structure coming in. Big Ben replaces this church perfectly. We then go to a further stage where I started to put in Trafalgar Square and Nelson's Column and you can see that it lines up perfectly with this large church and all of this is coincidence but is it coincidence or is it an innate sense of the geometry and for me I've always analysed paintings on a geometric basis. I've always started with a ruler and a compass. This is the canvas it's six feet by nine feet roughly two and a half metres by three and a quarter metres and this drawing as we're looking at it now is the by-product of about six months drawing. Now I work with assistants because this is a studio, it's a workshop and that's a very important part of my process. I'm very proud to work with very talented draftspeople. Each one of these buildings was drawn separately. The most complicated drawing here being this and this took six weeks. There are drawings back here that perhaps only took a day but building like, well let's take Big Ben because it's a nice easily recognised object, that's about a week's drawing and these individual drawings are made on computer but the computer is purely and simply a tool. The drawing process is a drawing process that was really established in 1500 and the reason I work with a computer is because I use a spray gun and to contain it you use a mask. The mask I used to cut with a scalpel and masking tape. Nowadays I use vinyl which is a silver adhesive film and we have to cut holes in that film and we could do it by wearing a magnifier over our eyes, cutting with a scalpel but it would probably take us 20 years to make this painting. Because we work on computer and we work with a vector-based program which is a mathematical program we can then send that drawing file down to a cutter which will cut the stencils out. When we're cutting on the machine downstairs we can cut to 0.4 of a mil. You have to look very hard and catch the light to be able to see where the machine has cut into it. There's a part of the roof coming off behind the dome and then we have to start looking for the really fine pieces. These are the flagpoles that sit on top of the building and these are the ties that anchor the flagpole down. And then these are some of the small elements like the air conditioning unit on the roof and wherever you're seeing white now that's where the paint will go through. Although it's self-adhesive you can float it over the surface at this stage and just approximately place it, one butterfly matching the other. Now you've got to move clockwise, clockwise, clockwise, clockwise, whoa. And this registration mark should come into place, yes. Hopefully that one is in place, that one. This is the critical stage again where you have to make sure you don't remove any of these very small elements that are just floating, they're islands. You can almost hear the glue pulling away and you can sense when you're going to be lifting a piece of this stencil that you want to have remain on the surface. Elements do move but they can be adjusted so that here, this flagpole, there should be a fine wire that's holding up the flagpole and the element here has moved so we just shift it over to create a thin line. That thin line will then be sprayed. I'm very organised in the foundations of the painting but increasingly as time goes on and I get further into a painting I'm acting faster and faster on intuition. The foundations are so firm I can take risks. So just now for instance I've chosen a colour which instinctively I know is going to fit in with the rest of the painting, it's going to work because I've started to establish rules as I've got further and further and my knowledge of the painting has grown. So the painting almost makes itself but also the painting as it grows becomes more and more independent and tells me what to do. Some of the changes I make in colour are very subtle. They're so subtle a lot of people would say well I can't even see those changes and then you start to ask or I start to ask myself well does it really matter whether other people can see them or not because the thing is I'm making the painting for myself but obviously especially if one is making a painting in public as I'm going to do in room one you inevitably do get engaged with the public and the question what the hell are you doing and it makes you question your own values. You go back into the studio and then you rely on what you've been doing for the last 20, 30, 40 years which is just operating off instinct. What I've done is to experience something outside in the world of so-called reality. I've then come back and for 12 months I've reflected on that in the studio and I have meticulously constructed and reconstructed every building, every window till I've actually divorced myself from the physical reality of this location. This is paint on canvas and I'm not a metaphysical painter in the sense that I don't have an agenda that I want to make a metaphysical painting. I want to make paintings that transcend their subject through materials to become something else. A quotation occurs to me over and over again on a daily basis within the studio and it's from Tennessee Williams and at the beginning of the Glass Menagerie the narrator says that I am the opposite of the stage magician. The stage magician offers you illusion in the disguise of reality. I'm here to offer you reality in the pleasant disguise of illusion.