How to adjust this acrylic material for C4D (please don't disturb the novice)

The transparency of the material is still a little low. Change the refractive index to about 1.5. In addition, the color of the material can be deepened.

There is also reflection and lighting, but the light source is not enough. Create two light sources on the left and right sides of the object, one as the main light source and the other as the auxiliary light source, and adjust the intensity of these two light sources appropriately.

The white area is still a little dark, so you can add about 5% self-luminescence (adjust as needed).

The highlight on the surface of the material is not rich enough, so it is suggested to build several reflectors around the model, and use synthetic labels to control the camera from being visible, only increasing the highlight details of the reflected objects. Or use HDR mapping!

Be sure to adjust the environment and light, otherwise the material will be difficult to reflect light.