Open the render settings dialog and do the following:
- set V-Ray as the renderer
- output size to 480x360px
- global switches: turn off default lights
- image sampler to adaptive QMC
- antialiasing filter “Mitchell-Netravali”
- indirect illumination ON
- Secondary bounces multiplier to 0,85
- Irradiance map settings:
- “low” preset
- HSph subdivs = 30
- environment:
- skylight pure white color
- reflection/refraction pure white, 1,2 multiplier
- system: render region division 50x50px