2d and 3d displace mod mapping differences

[GeneCrucean]

Can someone explain the differences between 2d and 3d mapping in the displacement mod?

Sometimes 2d works on non-landscape objects and sometimes not. But it's way faster.

[samuel_bubat]

2D Mapping needs mapping coordinates, 3d mapping doesn´t as far
as you use 3d Textures.
(You can use 2d maps/bitmaps within the 3d mapping as well, but than you will need mapping coordinates of course)
I think to remember, that 2d mapping also automatically produces
a bump map on top of the displacement.

[ihavenofish]

i noticed this once before, it seems to actually change the uvw coordinates between 2d and 3d, using an explicitly mapped procedural. never seen it with a bit map though. not sure which is the one behaving correctly either, both seem wrong compared to the map in the diffuse slot.

odd..

[vlado]

i noticed this once before, it seems to actually change the uvw coordinates between 2d and 3d, using an explicitly mapped procedural. never seen it with a bit map though. not sure which is the one behaving correctly either, both seem wrong compared to the map in the diffuse slot.

odd..

Make sure you set the W coordinate scale to 0 when using explicitly mapped procedurals with 2d displacement mapping. The 2d displacement method cannot produce a W coordinate (it uses only U and V).

Best regards,
Vlado

[ihavenofish]

cool. thanks