  We have systematically studied the effect of the orbital inclination in the
outburst evolution of black hole transients. We have included all the systems
observed by the Rossi X-ray timing explorer in which the thermal, accretion
disc component becomes strongly dominant at some point of the outburst.
Inclination is found to modify the shape of the tracks that these systems
display in the colour/luminosity diagrams traditionally used for their study.
Black hole transients seen at low inclination reach softer spectra and their
accretion discs look cooler than those observed closer to edge-on. This
difference can be naturally explained by considering inclination dependent
relativistic effects on accretion discs.
