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kaerimasu
04-04-2011, 02:58 PM
What exactly are world-aligned billboards used for? I understand that screen-aligned billboards are great for radially-symmetric particles and text and axis-aligned are great for things like trees.

Applications of world-aligned billboards aren't obvious to me. The examples I see of their use almost always are for cloud rendering, but I feel like axis-aligned billboards are much better suited for clouds. When a top-lit cloud texture rotates to stay visible, the effect is very unrealistic. The correction of the up vector that's part of the world-aligned billboard construction doesn't seem appropriate.

- Chris

Kelvin
04-04-2011, 03:48 PM
> What exactly are world-aligned billboards used for?

Advertising?

:)

I'll get my coat ...