generated and interact in a plausible manner.
Effectiveness of Scaled-Sigmoid. In Section 3.3, we in-
troduce a scaled-sigmoid function for NeRF albedo predic-
tion to accelerate the training process. To verify this de-
sign, we provide a comparison between the scaled-sigmoid
and the conventional sigmoid function. Their correspond-
ing generation processes for the same prompt are shown in
Figure 16. The numbers below images are the training iter-
ations in terms of Views-PP. It is evident that the 3D genera-
tion driven by the standard sigmoid activation evolves much
slower than that of the scaled-sigmoid. Notably, even with
ten times training iterations of the scaled-sigmoid, the net-
work with the conventional sigmoid function still does not
achieve satisfactory convergence. The evolution process of
the generated 3D object also shows that the scaled-sigmoid
enables a more significant capability of our model in adjust-
ing the output to match the text description.
Instant3D