In vray6.2, Decal Displacement Multiplier has no effect when the value is negative

As shown in the picture, the rendering result of vray 6.1 with a value of -1 is correct, while vray 6.2 with a value of -1 does not respond. I uploaded the engineering file, is this a bug?
111.rar (1.6 MB)

Hello @123456_1 ​, thanks for posting.

We were able to reproduce the described behavior. Thank you for pointing this out to us.
It is now logged in our system with VC4D-2136 number.
Please be sure that you will be notified by us about any further progress regarding this.

Have a great end of the year!
Best regards,
Daniel

Thank you for your reply

Hello 123456_​.

Thank you for your patience!
I’m glad to inform you that we have resolved the issue you reported.
We have implemented the necessary fix in the latest V-Ray stable build.
You can access the latest V-Ray stable through the following link.

Once again, thank you for bringing this to our attention. If you have any more questions or need further assistance, please don’t hesitate to reach out to us.

Best regards,
Daniel
​​

Thank you for informing me