Texture wobble when upscaling

[Triticum0]

This recomp seems to have bad texture wobble compare to melon ds on my hardware when upscaling

melonds 1x

Melonds.1x.mp4

4x

Melonds.4x.mp4

recomp

Recomp.1x.mp4

recomp 4x

Recomp.4x.mp4

[MysteriousAeon]

I traced one significant difference between the recomp renderer and melonDS that could explain this.

The current ndsrecomp internal-resolution path calls the melonDS compute renderer with high-resolution vertex coordinates disabled. At 4x, the raster itself becomes higher resolution, but polygon vertices are still derived from the native integer DS coordinate grid and then scaled up. melonDS normally enables its stored fractional/high-resolution vertex positions for high-resolution rendering.

That means recomp can render more samples without making vertex motion itself finer, which can make native coordinate snapping / texture wobble more visible at higher internal resolutions.

The renderer already contains melonDS's high-resolution-coordinate path, so this is a configuration/integration difference rather than a missing renderer implementation.

I have not confirmed yet that this is the exclusive cause of the provided videos because the exact HD settings used in the comparison are not listed.

If possible, could you confirm which settings were used for the recomp 4x capture, especially:

• internal rendering resolution
• texture upscale level
• adaptive widescreen on/off

A controlled A/B with internal resolution 4x and texture upscale 1x would be especially useful.

[MysteriousAeon]

One additional detail that would help for the A/B test: which OS are you running the recomp on?

[Triticum0]

Was tested on windows using default setting due to #14. Tested with and without texture upscale level and make no difference in my testing.

3060ti and 5700x

adaptive widescreen was on

[MysteriousAeon]

Thanks, that helps. I prepared a controlled Windows A/B build to isolate the high-resolution vertex-coordinate path from texture upscaling and adaptive widescreen.

Please download:

mph-hires-coordinates-ab-win64.zip from https://github.com/MysteriousAeon/ndsrecomp/releases/tag/intel-gl-diagnostic-1

SHA-256:

98cf1c835fdf7ae52cf53dfddae8a04b0f729475e10955a86455dfb2446031d7

Extract it into a fresh folder, place your verified ROM there as:

Metroid Prime Hunters.nds

Then run both:

run-baseline.bat

and:

run-hires.bat

Both builds force the same settings:

• compute renderer
• internal resolution 4x
• texture upscale 1x
• adaptive widescreen off
• separate test save files

The only renderer difference is:

Baseline:
SetRenderSettings(..., false)

Hi-res:
SetRenderSettings(..., g_internal_scale > 1u)

Please compare the same scene/camera movement in both builds and let me know whether the texture wobble is:

1. clearly reduced or gone in the hi-res build
2. unchanged
3. worse

A short side-by-side video would be ideal if convenient.

[Triticum0]

Was unable to test do to #22 also without keyboard and mouse mod was unable to move my character. don't know where the input mapping is stored without the gui