Sprite3D z-fighting

[aterim]

Hey there!

Is there some way to prevent z-fighting for Sprite3D?
(without disabling the depth test)

https://take.ms/xIyUN
https://take.ms/5pC2f

I know that this is not a trivial task, but maybe there are some tricks?

[jnsmalm]

Hi!

Maybe it is, not sure though :) Why do you need another solution than disabling depth test?

[lovelle-cardoso]

@jnsmalm I am also encountering a lot of problems with z fighting and Sprite3D when the z position of the 2 Sprite3Ds are equal and the sprites are slightly overlapping.

Is there a way to make it so pixi3D just automatically chooses one sprite to render in front of the other rather than interleaving them like the picture above? It doesn't even particularly matter to me which one it chooses as long as it just picks one to render in front of the other instead of glitching them together like it does currently.

[jnsmalm]

You can change the behaviour of this, right now by doing this:

// Don't read from depth buffer
app.renderer.plugins.pipeline._spriteRenderer.state.depthTest = false

// Don't write to depth buffer
app.renderer.plugins.pipeline._spriteRenderer.state.depthMask = false

Note that this might not work well if you are rendering other 3D meshes.

[choephix]

way to make it so pixi3D just automatically chooses one sprite to render in front of the other rather than interleaving them like the picture above? It doesn't even particularly matter to me which one it chooses as long as it just picks one to render in front of the other instead of glitching them together like it does currently.

Similarly, is there a way to force Pixi3d to render Sprite3D instances in a specific order, effectively ignoring z depth?

For example, after turning off depth test here, the cards on the other side of the board are completely hidden behind the large surface. I assume that's because their centers are technically behind the center of the surface. It would be helpful if I could just set the surface to zIndex = -1 etc, and for the engine to just trust me that I'm ordering things correctly via that property.

[jnsmalm]

Did you try to turn off depthTest and then use renderSortOrder on Sprite3D? https://api.pixi3d.org/classes/Sprite3D.html#renderSortOrder

[choephix]

Perfect, thanks!!