Decal Displacement issue

V-Ray V-Ray for 3ds Max Issues
1

Hi,

So i have a simple scene (attached) With a ground plane and decal. If i have displacement on both the ground and decal, using the material displacement attribute, everything seems to work. However if I use a vraydisplacement node on the ground object, the decal one no longer works.

image.jpg
image.jpg712×703 98.9 KB
image.jpg
image.jpg710×705 86.2 KB
​​
decal_displacement.zip (178 KB)

2

Thanks for the report. It seems the VRayDecal’s displacement settings (which are taken from the default displacement settings in the Render Setup) are overridden by the VRayDisplacementMod of the projected-on-object. There seem to be a few issues logged regarding the mixing of the two as well. Either way, these will be fixed when we eventually implement separate displacement settings for the VRayDecal itself.

3

thanks bud.

4

if I enable displacement map it “kills” all other ones as seen on attached picture. Also displacement isn’t rendered in scattered decals (with Chaos Scatter).

3dsmax_yIJRa8khfQ.jpg
3dsmax_yIJRa8khfQ.jpg639×782 174 KB

3dsmax_oLikzecwCR.png
3dsmax_oLikzecwCR.png925×540 86.7 KB

5

Need the scene to investigate this.

It seems to work on a simple scene. Maybe a mapping issue? Again, do send the scene.

6

I sent now (Submission ID# 5DMP-W4GP). sorry for the shitty displacement map - I just wanted to check if its generally working. Please pay attention there’s a larger problem (see description message)
Thank you for attention

7

1. The VRayDisplacementMod is meant for poly objects, not VRayDecal nodes, so no need to add it; just use the displacement from the material. Otherwise, the main issue is that your decal is overlapping with the ground plane - raise it (from z = -10, to -5) and you’ll get expected results.
2. The displacement indeed is not applied to the scattered objects only in the GPU (I tested on the CPU initially). Logged as VGPU-7159 for dev investigation.