This panel comprises at least two transparent material plates (1; 2) joined to each other by their internal faces (11; 21), while their external face (10; 20) is free; one (1) of these plates, preferably colored, carries a first pattern engraved on its external face (10), while on the other plate (2) is painted a second pattern, different from the first, a translucent surface being further interposed between the two plates (1, 2), for example as a result of the roughening of the internal face of the first plate (1). Thus, when the first plate (1) is exposed to light radiation (L), the first engraved pattern is perfectly readable in direct lighting for an observer located on the same side as the light source, while for an observer located on the on the other hand, oriented in the shade, it is the second motif which is clearly legible, by backlighting. The invention applies in particular to the field of stained glass. Figure for abstract: figure 1
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