I am trying to light 2D shapes using a rendered 3d model as a reference.
Simple sphere lighted with a single lamp.
Colored 2D shape
Circle colorized with G’MIC Colorize Interactive filter
Shading generated with G’MIC Illuminate 2D Shape filter
The shading layer is layered on top of the colored shape with Blend Mode:Hard Light and Opacity 85%.
Top Image is the reference image.
Bottom Image is the generated one.
All the configurations are done inside the G’MIC filter and I didn’t use any other editing options within GIMP.
My biggest gripe is I couldn’t match the shadows.
The reference image has a sharp shadow.
I fiddled with the filter’s settings under Illumination section but couldn’t generate anything similar to the reference one.
Also the quality of the rendered image is much higher to the generated one.
Increasing smoothness introduces a dark shadow on the rims.
Specular highlight seems off but I think I can manage that.
I am testing all these as I am planning to do lighting for 2d objects used for backgrounds/environments in animations with the help of this filter.
How can I match the lighting almost perfectly within G’MIC?