Je souhaite obtenir un effet “light box” (effet rétroéclairage) avec la zone lumineuse rectangulaire. Mais lorsque je place le rectangle à proximité du visuel, l’impact lumineux devient rond. - Je ne veux pas créer un effet rond. Et si je l’éloigne plus, je perds l’effet recherché. (voir image faite avec Lumion)
This behavior is indeed to be expected on the scene complexity itself as well as how far you are away from these light sources especially when it comes to rectangular/line lights - One way to circumvent this, just in case you may have the chance, is to make use of a supported ray-tracing capable graphics card which helps with achieving a lot more realistic shadows and more true to life light output:
Check out the “Ray-Traced Artificial Lights (Beta)” section in the release post above, or even our dedicated blog article alongside:
Just in case you may already own a ray-tracing capable card and just haven’t upgraded to Enscape 4.0 (or one of our latest previews) yet feel free to do so of course.