How are premade visuals for projection mapping made that interact with the masked out sections?

I’m hoping someone can shed some light on this concept. Have you seen projection mapping performances where the visual animation interacts accurately with the aspects of the building? ie. projecting ontop of a door to make it appear as if its opening, or accounting for masked out windows so the projection reacts around it rather than through it.

I’m trying to projection map onto a single rectangle shaped face of a building but what I’m not understanding is how to create a ‘template’ i could provide to animators that includes where the windows and doors are excluded. I’m currently testing it on a miniature of the building but I can’t understand how performances like this are able to accurately determine and create content that accounts for when it will be projected. The texture always ends up warped and not lining up correctly in kantan Mapper.

Hi @MikeBrz,

you could save out a image from KantanMapper with the shapes just shown as colors and perhaps annotated so an editor knows what animation will go where and what size it will have in the end.

Also after applying a texture to a shape in KantanMapper, click the “Edit Texture” button for the shape in question and adjust the texture size and corners in the now open window - it allows for counteracting the warping you are seeing.

KantanMapper can be seen as a bit quick and dirty adding textures to a physical shape. The more accurate procedure would be to use a 3D Model of the building and animate with that, then use camSchnappr to figure out the projector position and render from that point of view.

cheers
Markus

I’m trying to projection map onto the side of a building. Ideally I want to have a ‘template’ texture that I can use for the visuals so animators know where the doors/windows will be masked out. (so it appears the visuals are reacting to the blank spaces)

Using Kantan mapper currently with the projector offset to around 45 degrees from the model. (small scale) when I try to map the texture with the areas masked out it becomes warped and doesn’t line up with the surface. From what I’ve read its because of the angle of the projection?

I can’t wrap my head around what I’m doing wrong. Does anyone know how to do this correctly? I read that camSchnappr could possibly work. I cannot for the life of me understand how you can have pre-animated content that perfectly fits the physical features of the building.