Bump value converted from Corona to V-Ray

[DCHA34]

when I convert Corona files to V-Ray, either with the V-Ray tool or with VRayMaxConverterPro, the resulting bump is far too high.
Is this normal?

[hermit.crab]

Corona and V-Ray bump maps use different units, but the result after conversion should be identical. Is this not the case on your end?

[aida]

I expereince the same issue. Every bump map in the scene is set to an amount of 300 after conversion and looks wrong.
Any hints?

How could we mass edit the bump value to a lower value as a workaround?

Corona 12 update 1 / 3ds Max 2025.3, Vray 7.004

[Vizioen]

I expereince the same issue. Every bump map in the scene is set to an amount of 300 after conversion and looks wrong.
Any hints?

How could we mass edit the bump value to a lower value as a workaround?

Corona 12 update 1 / 3ds Max 2025.3, Vray 7.004

There's a lot of mass editors out there: Modifier Modifier Zorb is one of them. VMC also: https://www.oliverradford.com/3ds-ma...erial-control/

[hermit.crab]

How could we mass edit the bump value to a lower value as a workaround?

This simple script will change all Bump multipliers on VRayMtls (applied in the scene) to the chosen value; Run it in the script listener:

for i in sceneMmaterials where classof i == VRayMtl do i.texmap_bump_multiplier = 30