TransformedTextured depth (Z) values

I am using 2 TransformedTextured vertex buffers in my scene:

1 for the background

1 prop

I assumed that the Z value was a value between 0 and 1; where 1.0 was the back of the scene. This works well for the background, so with this thought, I also assumed then that z=0.5 would place the plane halfway between the front clipping plane. But this does not appear to be the case. The Z value definitely has an impact on the plane's position between the front and back clipping planes, but does not behave as I would have expected.

Can anyone shed some light as to how the Z value of a TransformedTextured buffer is used

Answer this question

TransformedTextured depth (Z) values

hammerstein06
What do you expect to happen and what happens (Please give more details. As is your question is too vague for me to try to answer.)
Numan azam
All I needed was Wessam's answer ... thanks for responding.
moebiusproject

This value gets divided by w then it is stored directly in your depth buffer...

Sorry, but that's a false answer... In the case of TransformedTextured, the z-value you specify is directly used in z-testing and will be stored in the depth buffer if the z-test succeeds...

The w-divide happens for vertices that use the T&L pipeline or vertex shaders. So in a vertex shader, you output normalized values that will be subsequently divided by w and then scaled to the viewport's size...

Sorry for the confusion...
TransformedTextured depth (Z) values

Answer this question