This is what collectors call a "brushstroke" postcard, where the printer has slightly embossed the image. Tuck's called these "Oilfacsims," and one estimate has it that about 2% of their total output of over 130,000 postcards were of this type, including some India ones like this one of Bangalore. (See The Postcard Album, No. 30, Brushstroke Postcards by Mieke Kennis, p. 27)
This is now known as Hoysaleswara temple or Halebidu temple, dedicated to Lord Shiva and was completed around 1160 CE.
[Original caption] Dreams in Stone, Temple of Halebid, Mysore State. Two most remarkable temples are here, the smaller of the two, star-shaped with 16-points, had a porch that from base to top was carved with sculptures of the best Indian art. The larger temple stands on a terrace. Some of the black pillars in the inner part of it have a dazzling polish are are carved with a minute elaboration of detail which is one of the most marvelous exhibitions of human labour, even in the patient East. [end]