Hello,
Thank you for reaching out in the Twinmotion Community. As you had mentioned, an option can be to apply a custom color gradient image as the texture. For Twinmotion 2023.1, we've added color correction options so that you will now be able to edit the base texture's Gamma, Lift, Gain, and Saturation as referenced in our Twinmotion 2023.1 Preview 1 Release Notes along with a few other new improvements regarding textures. Our livestream recording here shows this in Twinmotion's new UI for Preview 2: Twinmotion Livestream | Walkthrough Twinmotion 2023.1 Preview 2 new interface
If there are additional features that you would like to see incorporated, our Twinmotion Public Roadmap can be used to send feedback directly to the development team by commenting on an existing post or using the +Submit Idea button. There, you can provide feedback on how you would like to see a feature implemented and it's importance to you.
Best Regards,
Morgan