Forest Pack > Forest Pro (*)

Follow Displace Surface (V-Ray) problem

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Ricousto:
It's a little different, I don't use VrayDistanceTex but a vertex paint as a mask between 2 displacement maps (composite).

The fact is that the grass in my forest pack has an offset above my displaced surface equal to the amount of VRayDisplacement when I use the composite map.
When I only use my displacement map without the vertex paint mask, the forest pack grass moves closer to the displaced surface.

Any advices ?
Many thanks

Ricousto:
Bloody hell!
You're right, VRayTriplanar doesn't work with VRayDisplacementMod! (at least not with my old version of Vray!).
So I tried without VRayTriplanartex but keeping my configuration (Composite with 2 different maps and a vertex paint mask).
Unfortunately, I still can't work out why Follow Displace Surface (V-Ray) doesn't work!
Please find attached a simple scene

What the hell ? Please, can you help me ? What am I doing wrong ?

Thanks a lot

Michal Karmazín:
I'm sorry to hear you're still experiencing issues with it. The used effect is designed to be used in UV mode (evaluating the fpItem.distUVW values). If you prefer to use XY Surface mode, you can replace it with fpItem.position. This should work just fine.

Please find attached the modified scene (240429_followDisplacedSurface_iToo.max). I hope that helps.

Best regards,

Ricousto:
Thanks a lot

Sorry but I can't open your file, I'm working on a very old max

Michal Karmazín:
In such a case, you can easily edit it yourself. In the Effects Editor window, replace 'fpItem.distUVW' with 'fpItem.position', as shown in the attached screenshot. I hope that helps.

Best regards,

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