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Jungle
The ivy was generated using the IvyGenerator and the young leaves replaced by an Alien Leaf. This close-up shows the limits of the generator: vines may pierce a leaf, leaves may intersect. But you have to come quite close to notice, the IvyGenerator is a great free tool nevertheless. The scene is lit by my Precipice light-probe rotated by 180?, quality is set to 16, intensity to 9 and effect to 11. Unfortunately, I forgot to turn on some bump. Due to the lot of transparency, this needed over 40 hours to render.
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And as I sat in the sun reading a book, by Stephen King lets say, the vine suddenly snaked around my neck, yanked my out of my chair, quickly ensnared the rest of my body and squeezed me until I went 'SPLAT'. . . . . Well? Who's going to clean up the mess? Better use a BIG bucket. Large guys make large messes when squeezed until they pop by homicidal vines ya know! ;-) Oh, cool image by the way. Like it a lot. :-)
Hey, this really looks very real! Though I'm not sure if the guys that made the Ivy Generator meant it for such a close-ups. Apart from the angularity and the intersections/collisions I can say that the lighting is very good, again. The green of the leaves correlates extremely well with the backdrop.
Taken as a whole it looks very good. As yourself pointed out, there are issues with a few collisions within the geometry at this scale and the vines are a little angular in themselves. Neither of which is your fault but shows rather the limitations of the program in creating a geometry to be viewed in close up. Also noted is the lack of bump, but it would only want to be very subtle anyway. Light is top notch, no doubt, another triumph for your hdr manufacturing skills. 5/5
Lighting is spectacular. No complaints there. The meshes are just fine actually. Funny thing is that the ivy generator can be assigned any leaf pattern and shape based on a photo. It can single handedly solve most vegetation problems. Thank you for the discovery of thsi program. Do you happen to know who wrote it or where it came from? Are there other similar programs out there? I am looking into a system to use the ivy generator for landscapes of trees with the vines disabled or hidden and the leaves mapped with tree photos. As you mention the ivy generator and ibl do not get along well due to the belnd transparency rigging. I wish this could be remedied, oh well.\ Above, the only suggestion I would make is to use real flower images instead of purple colored leaves. The purple leaves look like they should have been purple flowers. The vines liik great but could have used some bumpmapping so that they were not so smooth, it would break up the appearance of shine also perhaps. This particular hdri is another hit. I have been so stupid as to not download the others that you have made temporarily available, but if you make this one available I will surely use it. I like the way it illuminates the leaves in the shaded areas, very realistic indeed!