Cubemaps is commonly used to do image based lighting, store point light shadowmaps, and etc.
Many games use cubemaps to simulate offscreen specular reflection before raytracing is possible in realtime.
One problem with cubemaps is that there could seams between the different faces when perform bilinear sampling. Yet this is fixed with modern gpu hardware support.
Cubemaps is commonly used to do image based lighting, store point light shadowmaps, and etc. Many games use cubemaps to simulate offscreen specular reflection before raytracing is possible in realtime.
One problem with cubemaps is that there could seams between the different faces when perform bilinear sampling. Yet this is fixed with modern gpu hardware support.