c1enyang

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Multiple GPU training support

@zhuangdf Great! Could you please share the mult-gpu mvsnerf code?

There is a problem in the rendering process for gradient colors.

Hi, I have the same problem. Did you solve it now?

There is a problem in the rendering process for gradient colors.

> ![image](https://private-user-images.githubusercontent.com/69423227/290493034-2478ffa1-895d-41e9-baac-b642aeb84938.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.XVNUXJQi9sww7Vd81uQkVawGjNDbPPS2Y5KxlQtuSBQ) I found that the problem came from the color sampling process of forward rendering. The parameter pt passed in this function is the coordinate of the point in...