Dear D5 Render Team,
First of all, thank you for your continued development of D5 Render—it’s a powerful and intuitive tool that allows for fast, high-quality visualization. The recent updates to material control and lighting workflows have been especially valuable.
I’d like to propose a feature that would significantly enhance the realism and flexibility of fabric materials in D5:
Currently, D5 does not offer a way to control the Fresnel effect or falloff behavior on cloth-based materials such as velvet, satin, or brushed fabrics. These types of materials depend heavily on how light interacts with their surfaces at glancing angles—something that standard roughness and normal maps alone cannot fully replicate.
Why This Matters:
- Velvet and satin fabrics rely on a strong falloff effect that darkens the material at certain angles and adds a soft, directional sheen.
- Without Fresnel or anisotropic shading controls, it’s nearly impossible to achieve realistic representations of these materials, even with high-quality textures.
- Competing software (like Blender, Unreal, or V-Ray) allows users to fine-tune this behavior via Fresnel IOR, falloff curves, or sheen angle.
- Architectural and product visualizations often require photorealistic soft furnishings (curtains, sofas, clothing, etc.), which are difficult to render convincingly without this control.
Suggested Implementation Options:
- A Fresnel IOR slider for all materials, or at least for fabric-type presets.
- A toggle to enable falloff intensity and tint control.
- Optional sheen direction or anisotropy angle for cloth surfaces.
Benefits:
- Better realism for interior and fashion scenes.
- More control for artists to match real-world fabric behavior.
- Improved competitiveness with other rendering platforms.
Thank you for considering this request. I believe this feature would be a strong addition to D5’s material system and greatly appreciated by the visualization community.
Best regards,
Jan