NVIDIAGameWorks / NVIDIAGameWorks/rtx-remix

[Runtime Bug]: Decal displacements don't override displacements underneath themselves.

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bug jira runtime
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Description

Describe the bug

When a decal texture is placed over another texture, and the texture underneath has a height displacement, this shows through to the decal. Meaning things like posters or drains or vents that are used as decals in source engine games get mixed into the underlying textures like stones, making them look incorrect.

Image
How do you reproduce the bug?

Load into hw_confession_1 and noclip into the office and observe the posters on the walls.
This also happens in many other cases.

What is the expected behavior?

The expected behavior would be that the decal texture masks out the displacement or displays over top of the displacement of whatever texture is underneath it.

Version

All Versions.

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Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by loading hw_confession_1, nocliping into the office, and observing the posters on the walls. Investigate the runtime's decal and height-displacement handling; done means decals mask or render over the underlying displacement without showing it through.

Written by the indexing model from the issue text.

Assessment

Domain
computer-graphics, game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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