Hello - I have a problem with light linking in RS. It seems that lights do not properly obey object exclusion when passing through transparent object . Diffuse, shadows, and specular all seem to work properly based on the outside of the object. See attached image. Caustics also DO NOT obey light linking (not pictured). I'm on C4D 2023.1.3 and RS 3.5.13

Any thoughts how to remedy this bug?

Image Link

Just submitted one myself. Thank you.

Update: I was successful with copying the RF emitter and fluid and dropping the resolution WAY down. Then, I linked the low and high fluids and mesher together. Didn't effect the original look of my sim much and I was able to assign a unique TP group to the smaller particle group. Rendered as expected.

Ah ha, that explains why I DO see it when I'm using Octane on occasion. Thought is was me being crazy. lol

Thanks for the response as always!

I've noticed the Lighting Tool is nowhere to be found in a menu in 2023.1 and the only way I can access it is through Shift+C quick search. If I customize my palettes and try to add it, it just disappears. Also noticed it doesn't work with RS lights, and the only documentation I can find is in "Classic Resource Overview". I used this tool quite a bit when doing product renderings. I'd hate to see it go!

Thanks again for brainstorming with me Dr. Sassi,

I think the only TP channel data that comes over from RFlow is age, velocity, and vorticity if clicked on. I also didn't find any documentation on RF specific xPresso nodes. Maybe I didn't look deep enough. In general, seems RF doesn't send much data through unless I don't fully understand the process.

Can't say I fully followed your thought processes here, but it got me thinking. I could make a duplicate of the emitter and fluid with 1/10th or 1/100th the fluid resolution. It would interact and flow with the higher res fluid. Different TP groups can be assigned to each unique fluid object. Then I could just use the TP group that is a fraction of the density for the bubble geometry. This might be a partially what you were suggesting?

Anyway, thanks again for helping me talk through this. I appreciate it. I'm going to try the process I just mentioned above. I'll have to re-sim my scene, but probably a faster solution than fighting with memory or fumbling my way through xPresso.

@Dr-Sassi - It's good to know I'm not losing my touch.

I just did a test of 20 frames of my large simulation and it worked fine. I could even bake a mograph cache on the matrix and it worked. When I baked it into the file, the scene was 64GB!

My TP settings say there's 800,000+ and it can see up to 1M. It has to be a memory issue. So, here's my next question.

Is there a way to ONLY cache the visible matrix objects? Since I'm only wanting 1000 "bubbles" (to throw a number out there) based on my 800K particles, why do I have to save data for non-visible elements?

Is there a way to apply a matrix/cloner to only the visible matrix? Then cache the new system?

@Dr-Sassi Thank you for your thoughts.

It's probably not practical to upload the scene file as my particle cache is 11GB? Let me try trimming the frame range which would make it a much smaller file.

I did create a new scene with a much smaller particle cache file from RealFlow and everything works fine, just as expected. Same structure and setup as my larger scene. So my process must be correct? I'm wondering if it's a processing time-out thing? My main scene has 1.5M particles so maybe RS doesn't wait long enough for the frame of particles to load and populate the matrix? Perhaps I should try Standard Renderer just to see if it is a rendering breakdown.

You mentioned the MoGraph Cache tag. In my smaller scene, I was able to cache the matrix and delete the particle cache and everything stuck and worked fine. In my larger scene, if I try to cache the matrix, it turns green when done, but then when I click to any frame, the tag turns red and the matrix nodes lose all data. I even tried baking the cache to files to save on the memory?

I would appreciate any other thought you may have at this time. Otherwise, I'll let you know when I have a sample of the scene file uploaded for you to check out.

Hello! First time posting.

I'm trying to create bubbles in a RealFlow cache using this approach from Jakob Appleby.

I can get the matrix to clone to the Tparticles and thin them out with random visibility. But then I had issues with the matrix not updating for each frame in viewport or render view.

I fixed the updating in viewport by switching the matrix generate to Thinking Particles. But it still doesn't update when rendering the sequence. It does update frame-by-frame in the Redshift RenderView though. I'd like to render with RS Matrix scatter rather than a cloner attached to the matrix.

I've tried object order, priority tags, nothing seems to work. I even tried caching the matrix or baking to alembic, but that doesn't seem to work either.

Any help in getting my matrix bubbles to render to frames would be greatly appreciated.