I used to tell you how you can improve the solar lighting in a room. SH3D allows you to show such illumination with sunlight, but sometimes it doesn't turn out to be beautiful enough, the sun is too weak or the shadows are not very contrasting. Either the sun has insufficient temperature, or the spectrum is too yellow. Everything can be done as you need. I modeled a simple room and decided to make the lighting bright with the sun at sunset. It is very important to understand that for a beautiful picturesque picture it is necessary to run light of different temperatures into the room. The sun at sunset is very colored with an orange spectrum. But in the shadows, where this spectrum of the sun does not penetrate, a cold shade from diffused lighting from the street necessarily remains. It is this combination of bright orange and cool blue that gives a beautiful combination on the border of the shadows. And there is also a very important phenomenon - the rays from the sun seem to lick the shapes of objects and a blurred shadow border appears on the wall. This phenomenon is called Diffraction.
so, first of all, I set the render mode to 0.00 at night. And he created an artificial sun. To do this, I made five spherical lamps with a diameter of 50 cm, assigned them a bright orange color and a power of 70%. The ceiling height in the room is 300cm, there is a window and I placed my sun far from the window (500cm, you can go even further) on the street at a height of 200cm, this is above the horizon, above the viewer's eye level, the camera height is 150cm. Such an artificial sun just resembles the moment of sunset, when the rays are almost horizontal and even slightly directed upward. The further away from the window you place this bright orange ball, the more realistic the direction of the rays from the sun will be, they will be more parallel, not directed like a cone. but the distant location of the sun will require more power. You can add additional lights to the group and increase their power to 100%. Now I have created a cool blue light that should emphasize the difference in temperature between the illuminated places on the wall and in the falling shadows. At the border of the shadows there will be a beautiful mixing of two colors - orange and blue. I made this light source out of blue hemispheres rotated 90 degrees on the X axis. The size of these hemispheres is 100x100cm and 23cm high, so it is a directional stream of light and slightly scattered in different directions. I made a group of 12 such hemispheres turned towards the window and placed them in two rows in height, so that it would be wider later. The bottom of this group is 178cm high. This strong blue light source illuminates the entire room from the street.
For the interior lighting of the room, in order to get soft illumination from all sides, this simulates the reflexes in the room, I placed 16 tall hemispherical towers (12 white and 4 orange in the fireplace area). The dimensions of these towers are 100x100cm and 250cm high, the height above the floor is 30cm, and the capacity is 1%.
The rendering mode is standard, 4k + Glossy, 3000 pixels, 3D view. I tried to apply the Pathtracing + Silk mode. But I couldn't achieve good quality. there is a strong grain in the shady areas. Therefore, the reflection in the dark marble by the fireplace is very sharp, as in a polished material, without moire edges. I can't use Pathtracing mode for complex interiors yet, it's a pity. But the size of the sun, 50cm, gives the desired effect (imitation) of diffraction and a complex play of color in the shadows is visible. I advise you to use this method, it allows you to fully control the lighting mode from the sun. If the color of the spheres is made white, you will get a daytime mode with a bright white sun. But then there won't be such a complicated trick of light. But there will be a contrasting sun without coloring, as at sunset in the evening. But such a sun can be placed low and let the light into the room far inside the room.
With white sunlight, the sun shines low far into the room
