search

guillaumechereau / goxel

Goxel: Free and Open Source 3D Voxel Editor
GNU General Public License v3.0
2.83k stars 226 forks source link

Vertex colors don't work properly on UnrealEngine 5 #314

Closed jerobarraco closed 10 months ago

jerobarraco commented 1 year ago

Hello, nice software. I have an issue where the vertex colors on unreal engine 5 are not directly usable. i have to modify them like color -.5 / .5 to get something that resembles the original color but yet it looks very bad. i tried tonemapping hdr, srgb and linear and nothing. it has a very weird scale.

pd: i know i can use the texture method, but i want to use vertex colors.

guillaumechereau commented 1 year ago

Does it work with the texture method? To me it seems that the issue is of linear/sRGB. Goxel exports the vertex color in sRGB but maybe it should be in linear indeed. [EDIT]: it should be in linear RGB now actually.

guillaumechereau commented 1 year ago

Could you send me a screenshot of the same exported mesh with texture and vertex color in Unreal Engine?

jerobarraco commented 1 year ago

like i said, textures works but is not useful to me. screens

this is how it looks at the moment, but i had to do a special material to do it and the colors look just bad. notice is unlit. also sorry is hard to position correctly image

this is the transformation i need to apply image

this is in goxel image

this is the palette im using https://lospec.com/palette-list/atari-8-bit-family-gtia

this are the gox and gltf files Palette.zip

guillaumechereau commented 1 year ago

Are you using the last release? Maybe you can try with the current nightly build version available here:

https://github.com/guillaumechereau/goxel/actions/runs/5609710977

jerobarraco commented 1 year ago

tried that one, crashes unreal.

guillaumechereau commented 11 months ago

I think one of the issue is that currently the texture generated by goxel uses a single pixel per voxel color, and it does not work well with unreal engine. I think I will try to use a larger area by pixel, see if it improves the situation.

guillaumechereau commented 11 months ago

OK I think that fixed it, at least with a little test model I used:

image

jerobarraco commented 11 months ago

hey sorry i forgot to update this. im using ue 5.3 now, i think there were some issues with 5.2 the new builds but on 5.3 works well. and the colors are exported correctly. ive been using buid #72 and today i used #88 and they seem to be working fine. https://youtube.com/live/Z7WWzGsPobU