LT = (cid:107)T (t) · m(t)(cid:107)2

(9)

6

where m(t) is a mask indicator that satisﬁes m(t) = 1
when t < ˆz, otherwise m(t) = 0. ˆz is the pixel-wise depth
value in the aligned depth map ˆD. T (t) is the accumulated
transmittance which is same as the T (t) in Eq. 1. The total
objective is then deﬁned as:

Ltotal = LRGB + λdLDepth + λtLT ,

(10)
Text2NeRF- Text-Driven 3D Scene Generation with Neural Radiance Fields