![]() If that mostly relies on several bounces to get from source to whatever is in a given pixel then it will take a long time for that pixel to get to a settled value.A while ago I’ve asked you all to download a test scene and see how fast it renders. Iray is simulating that, but it can't run each photon in a small fraction of a second so it has to plod through tracing the paths taken by light rays starting with varied start positions (for non-point sources) and angles until it reaches a settled value for each pixel. The human eye doesn't do anything in that sense - it just receives all the photons that end up hitting it. if they did I would simply render those sub-scenes together in daz. there is an interaction between the very bright red dragon outside the view but there's no interaction with the background.īoth versions are lit with only a sky of iradience and the emissive dragon.Īs for the first image the buildgins and the train each layer was set up because they don't interact with another. Neither the eye nor the iray is going to see anything that light is interacting with. I just took advantage of the fact that I can see there's no interaction between the back scene and the front image.Īccording to theory the human eye can discern a candles flame at 1.6 miles under optium conditions. Same with the image for the eye reflection. The render engine doesn't have that option it checks the pixels in the back with the light just to find out if they interact. The human eye can look at a read scene like this and see whether there is any red light on the background because it's seeing light that has completed it's move (at the mere speed of 186,000 miles per second). ![]() ![]() The image below was taking an extremely long time to render probably related to the fact that the engine was checking all vectors between the light (behind the dragon) and the backdrop. That said under some conditions layering rendered images can be a good approach especially for comics. The first will not preserve the interaction among elements as shadows and reflections, also doesn't allow depth effects since there's no z-buffer, also doesn't allow to retarget lights or tone mapping since it's not HDRI. Layering rendered images with a paint program, and compositing render layers with a compositor. You are confusing two very different things. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |