Using some custom resource packs results in white grass block sides in viewport and renders.

[drepman]

Title pretty much says it all. I assume this has something to do with the pack requiring Optifine for some features? Is there a work around to get the normal green sides, an option I'm not seeing, or is this just a straight up bug? Shows up in both cycles and eevee.

[StandingPadAnimations]

I assume it's due to the pack requiring Optifine features. As a work around you can go to materials and replace the side blocks with the top blocks

[StandingPadAnimations]

as far as I'm seeing, the pack requires the multiside grass thing from Optifine, which is not in MCprep

[TheDuckCow]

StandingPadAnimations is right. So generally grass is re-colored by the node group in MCprep which overlays a color. Normally dirt with side grass doesn't need this, as default texture packs apply a sort of default coloring, and thus by default MCprep doesn't colorize it further (as it would further distort other colors too). However, you can manually re-enable it. See the screenshot below (after prepping materials):

[TheDuckCow]

Just bumping this up @drepman, let us know if the above comments help in this case!

[TheDuckCow]

I'm going to close this thread in the meantime. I considered whether to mark this as a feature request, but the variance between resource packs makes it not easy to implement. I will aim to leave the "add color" node in even the simple material mode method to make this workaround easy.