I'll completely remove any possible source of the white background:

I've completely removed all possible sources of the white rounded square:

1. Removed Environment component - This was likely causing the white background effect
2. Simplified lighting - Removed complex lighting that might have been creating reflections or shadows
3. Added explicit CSS rules - Added CSS to ensure all canvas elements and containers are completely transparent
4. Added inline style - Added an inline style to the card container to force transparency
5. Used direct image URLs - Using the exact image URLs you provided to ensure proper loading

The card should now appear without any white background or rounded square behind it. It's just the card with your images floating in the gradient background.

I'll create a completely new implementation with no extra components that could cause a white background:

I've completely rebuilt the card implementation from scratch using basic Three.js without any extra libraries or components that could cause a white background:

1. Pure Three.js implementation:

   • Created a basic Three.js setup without using any drei components
   • Set the renderer to have a transparent background with alpha: true
   • Explicitly set the clear color to be transparent with renderer.setClearColor(0x000000, 0)

2. Simple materials:

   • Used MeshBasicMaterial instead of MeshStandardMaterial to avoid any lighting effects
   • Applied the textures directly to the materials

3. No extra elements:

   • Removed all shadows, environments, and any other elements that could appear as a white square
   • Only included the card mesh and basic lighting

4. Forced transparency:

   • Added CSS that forces all canvas and div elements to have transparent backgrounds
   • Added inline styles to ensure transparency

This implementation is stripped down to the absolute minimum needed to display the card with your images. There should be no white background or square - just the card floating in the gradient background.