Discover Top Posts Tagged with #rgb shadows

Moire pattern grids

Two frames, video tape stretched across with gaps the same width. The screens are set at an acute angle and illuminated with RGB led lights. Moire patterns are generated by the frames and the coloured shadows throw onto the wall behind.

#video tape #moire patterns #rgb lights #rgb shadows

Faux Newton’s Rings

Plastic woven mesh, Self moire pattern, Faux Newton's Rings

Moire patterns generated with plastic mesh and its own shadow, because the mesh is not flat and evenly distant from the wall on which the shadow falls the moire patterns are uneven and wave like and because of the RGB lights the result looks like a Newton’s ring.

Seen from the origin of the light, essentially perpendicular to the object, there are few wave fronts, obvious really, as the object and its shadow are in line and cannot interfere with each other but as the viewer’s angle becomes more acute the number of wave fronts increases massively.

(There is a physicist somewhere who can explain this to me but they will have to do it with really simple maths. Strange to have a scientific background that required so little maths.)

#moire pattern #plastic mesh #rgb lights #rgb shadows #newton's rings

Paper Grid

Moire patterns can be generated in many ways, for example between an object and another object, an object and its own shadow, or its reflection in a mirror, in this case its shadow. In white light the moire pattern will usually be black and white, since in this clip the object is lit with RGB lighting the resultant shadows are coloured.

#rgb lights #rgb shadows #moire patterns #paper sculpture

Black is not really black!

Even the world record holding Vantablack is not really black it still reflects, an admittedly tiny, amount of light, but in this case there is a certain aesthetic appeal to that. I am not using vantablack card I couldn’t afford it.

I had mentioned previously that I felt obliged, having tried white on white and white on black to make a black sculpture and try that with white and black backgrounds. Here the black background means that the modest amount of light that is reflected from the piece is not lost in the flare from a white background.

On a white background the moire pattern is blindingly obvious but the colours less obvious since the RGB mixes to white and reflects.

It is funny, when I look at the card that I loosely refer to as black, it is a sort of very dark grey green and one side is slightly shinier than the other, but you use what you have lying round the studio and sometime it just works.

#paper sculpture #rgb lights #rgb shadows #moire patterns