Area Light and soft shadows

Point lights: In order to check the light intersection with object, we need to fire only one ray in the direction of the point light from the currently intersected point.

Area Light: Area light work differently from the point light. As in area light we need to generate more rays towards the geometry representing area light. Hence, a lot more rays are required for the calculation of light.

While implementing area light, I randomly sampled over 9 points on the area light. However, the result is not good. Following image is generated using area light with 9 sample points:

In order to correct it, more samples are required. However, every time I increase the number of samples from 9 to any number greater than that, my CUDA crashes giving error.

Still trying to resolve the issue.