jMonkeyEngine / jMonkeyEngine/jmonkeyengine

FPP or ComposeFilter changes causing issues in 3.1.0-beta1

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bug Needs investigation
Dominant language
Java
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Description

Hi,

I tried using ComposeFilter to combine several previews into one mainviewport via ComposeFilter, but this seems to be breaking in 3.1.0-beta.

My test was:

  1. 1 preview with red background rendering into texture
  2. 1 mainview, BlackNoAlpha background with ComposeFilter, texture from preview
  3. Red screen is expected.

This works in 3.0.10, but not in 3.1.0-beta

Related discussion:
https://hub.jmonkeyengine.org/t/bug-difference-between-fpp-or-composefilter-between-3-0-and-3-1/35855

Contributor guide

Open the contributing guide

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

Reproduce the described preview-to-mainview setup with ComposeFilter and compare its behavior between 3.0.10 and 3.1.0-beta1. Start at the FPP and ComposeFilter entry points, using the linked discussion for context. Done means the red preview renders correctly into the main view in the affected version.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
computer-graphics, game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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