So I was just using blender 3D modelling and I decided to take 6 objects and join them together using CTRL + J and suddenly the program just slowed down real hard.
What is the cause of this please and is there a way to fix this? Do I have to delete my object again?
This can be fixed by applying the join modifier, applying it when needed, or upgrading your PC.
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Building a project in Unreal Engine 4.26 while trying to increase the performance of the videogame I ended up using instances of static meshes where possible. This generated an issue:
My instantiated meshes are scaled to 0.9995/1 (experimentally proven).
Looking for an answer I found a work-around suggested by Unreal Engine devs themselves: they suggested to rotate the mesh adding a rotation of 360 degrees using higher values of the same rotation as you can read here. This didn't work for me and, as you can see, the difference between instantiated and manually placed meshes are evident.
Following the way I've instantiated the meshes:
Increasing the rotation on z-axis using 450 degrees didn't solve anything even though doing it with the meshes provided by devs here actually works.
I'm sure that rotations are the key to solve the problem since the problem is not systematic, I didn't get the logic behind but by building a square with instantiated meshes I end up having some walls with spaces and some of them with perfect scale. I increased the size of them all so as to not have spaces but I'm afraid that the solution will bring more issues in the future while working with light and production materials. Seems that the bug isn't solved yet in UE4, is there another workaround that I may use without any risk of overlapping meshes?
Seems to be a bug not yet solved, to populate the map with objects where is necessary to have a high accuracy level is suggested to place them manually. If you place them manually, UE4 will make them instances, it's not necessary to have a blueprint to populate rooms programmatically.
Increasing the scale how I did in the first place doesn't seem to cause problems but I ended up placing them manually since as solution is more elegant even if it requires more effort.
I am currently learning how to sculpt in Blender; working on my own projects after completing BlenderGuru's Beginner & Intermediate classes, and some of Grant Abbitts videos with pleasing results. I am trying to sculpt a plasmapistol with a skull on it, which can be seen in the reference photo that I have provided.
However, when I sculpt, I get these really odd linear artefacts (See picture below, circled in black). I added a Subsurf Modifier to the primitive UV Sphere, with the Viewport and Render Values set to 4, so it is a fairly fine mesh. However, these still artefacts occur.
I assume it is due to the stretching of the polygons when I grab the sphere with the Snake Hook tool and deform it to encompass the frontal part of the skull.
EDIT: Whilst writing this comment I went back, and switched on Dynamic Topology with Relative Detail selected.
It appears that I am no longer getting the issues that I was getting last night with the linear artefacts.
Can I confirm that these problems are a result of having the incorrect Dynamic Topology settings for using the Snake Hook Tool; I was using Constant Detail instead of Relative Detail, or is this being caused by another issue?
Also, any advice on avoiding common pitfalls when choosing the settings in sculpting would be most appreciated.
I will continue to ask this question incase anyone has a similar problem and it can be resolved by reading this.
Sculpt, showing lineations
Experimenting with Dynamic Topology
In Object Mode, does the object have uniform X, Y, & Z scaling? If not, you can apply the scale from the object menu.
Object ‣ Apply ‣ Scale / Rotation & Scale
I am working on a game which was developed by some other guy earlier. I am facing a problem that when player(with camera) start running on the road the buildings are not being shown up in their regular shape and as we move forward (more closer to the buildings) they gain their original shapes, and some times the buildings present on either side of the road are not visible by camera ( empty space ) and when we move closer to the building it comes up as visible object suddenly. I think it may be some unity3d setting problem (rendering , camera or quality). May be, it was being done due to increase performance on mobile devices.
can anybody know what may be the issue or how to resolve it.
Any help will be appreciated. Thanks in advance
This sounds like it's a problem with the available LODs for each building's 3D model.
Basically, 3d games work by having 2-3 different versions of each 3D model, with varying *L*evels *O*f *D*etail. So for example, if you have a house model which uses 500 polygons, you'll probably have another 2 versions (eg 250 polys and 100 polys), which are used depending on the distance between the player and the object. The farther away he is, the simpler the version used will be.
The issue occurs when developers use automatically generated LOD models, which will look distorted or won't appear at all. Unity probably auto generates them, but I'm unsure where you'll find the settings for this in unity. However I've seen 3d models on the unity store offering models with different LODs, so unity probably gives you the option to set your own. The simplest solution would be to increase the distance the LODs change at, while the complicated solution would be to fix custom versions of the 3D models for larger distances, with a lower poly count.
I have resolved the problem. This was due to the LOD (level of details) used for objects (buildings) in Unity3d to enhance the performance on the slower device. LOD provides many level of details (of an object) which you can adjust according to your need . In my specific problem the buildings were suddenly appear due to the different (wrong) position for LOD1, i.e. for LOD1 the building was at wrong place but for LOD0 it was at its right place. So when my camera see from the distance it see LOD1 which was at wrong place thence it sees empty space with no building at the expected position. But when camera comes closer it sees LOD0 in which building is at the right position and it seems that buildings are suddenly come or become visible.
I'm trying to make an OpenGL renderer that mashes various shapes into one large mesh and stores these in two VBOs, one GL_ARRAY_BUFFER and one GL_ELEMENT_ARRAY_BUFFER. I'm aiming for it to work on both OpenGL ES 2 and OpenGL 3.2 core. I am currently trying to find the best way to handle deleting shapes from within this mesh and my current approach is to periodically rebuild the entire thing, possibly on a background thread.
The problem is that in order to rebuild the new and clean mesh, I need access to the vertices / indices that have been written to the buffers using glMapBuffer. According to the documentation for GL_OES_mapbuffer, WRITE_ONLY_OES is the only acceptable parameter for 'access'.
So, I don't think the data pointed at there is reliable to read from in order to create my new buffers. I know there are other functions in GL Core that allow you to copy the buffer data, but these also seem to be missing.
Can anyone verify that this is not possible on ES 2.0 or give some approach for achieving buffer reading? My current solution is to keep a shadow copy of all the data, which is obviously not ideal.
I think that keeping a shadow copy of GPU data in main memory is much better than reading these data from GPU memory. It is recommended to discard previous data before using glMapBuffer anyway. Read this for more information (It will not give you direct answer to your question, but it might be usefull).
I am setting out for a visualization project that will generate 1000+ sprites from dynamic data. The toolkit I am using (Flare) requires some optimization. I am trying to figure out some optimization techniques for Flash. How can I make Flash run fast when there are so many sprites on the stage, or maybe there is an optimization technique that doesn't involve generating so many sprites?
One good way of doing is freeze animations which are not visible to the user. But the complication with this is that, you need to remember the state from which the animation has to resume or refers the animation based on the current state of the whole application. Since you have so many sprites generated, make sure that you group them logically. This would help in easily implement the freezing logic.