"It can't be an issue. I've got to work it out," he said on Monday.
"You've just got to get used to it. I think it's trying to get it out of your mind. I can see the colour of the ball, I pick it up.
"It's just at times it takes a little bit longer to work out the depth of where it's coming.
"I've got more used to it I suppose. The more you play, you get more used to it."
Kookaburra has developed a new ball since last year's inaugural day-night Test, notably changing the colour of the seam from green to black.
"The ball is getting better year in, year out. It'll be interesting to see what it does," Wade said.
South Africa, who will be playing their first day-night Test, hold an unassailable 2-0 lead in the three-Test series.
- AAP