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This is how a freehand is born - layer by layer, painted by the artist’s hand, with no decals and no shortcuts. Want to add a freehand to your army, vehicle, or model? Message us: [email protected] #Freehand #Warhammer30k #HorusHeresy #Miniature #WarhammerCommunity

12,443 Aufrufe • vor 3 Monaten •via X (Twitter)

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🎓Learn how to create a powerful Torn Fabric smart material in a matter of seconds in my latest video series (AAA) Pro Tips! This smart material can be used on virtually any 3D asset. ____________________________________________________ In this video, the steps are as follows: 1. Create a base fill layer containing no information. We will use this layer to call out the core effects. Add a black mask to this layer and inside that mask add a paint layer and draw a simple pill shape. 2. Next, add a blur directional and be sure the direction is the same direction that your fabric is flowing to. 3. Add a UV border generator set to subtract to mask out any uv seams followed by an anchorpoint. Additionally, add a messy Fibers 3 fill layer set to overlay. 4. Use a levels to adjust the mask along with a sharpen filter. A warp filter should also be added to introduce some randomness. Add an anchor point at the top of the mask as well. 5. Create another fill layer with its opacity channel set to black and apply a black mask to the fill layer. Inside its mask retrieve the anchorpoint information from the previous fill layer. 6. Create an additional fill layer with a bright diffuse color along with a black mask applied to it. Add the anchorpoint information from the previous mask into its mask as well and this should give us some white fibers on the edges. Now we have a torn fabric effect wherever we paint using the paint layer created inside the callout mask! ____________________________________________________ More AAA Game Dev Tips can be found on my YouTube channel here: Stay tuned for more weekly Tips! Happy Texturing!💚 #gamedev #gameart #tutorial #3dmodeling #hardsurface #texturing

Cohen Brawley

78,842 Aufrufe • vor 2 Jahren

Backpropagation by hand ✍️ ~ 11 steps walkthrough below Backpropagation is the algorithm that actually trains a neural network, and it is where most people stop following along. It is not calculus you cannot do. It is matrix multiplication, working backward, one layer at a time. So I drew and calculated one entirely by hand. Goal: push the loss gradient back through a 3-layer network and land on a new value for every weight and bias. = 1. Given = A 3-layer perceptron, an input X, predictions Ypred = [0.5, 0.5, 0], and the truth Ytarget = [0, 1, 0]. = 2. Backprop gradient cells = Let us draw empty cells for every gradient we are about to compute. The shape of the answer comes first. = 3. Layer 3 softmax = We get dL/dz3 straight from Ypred minus Ytarget = [0.5, -0.5, 0]. No chain rule needed, and that shortcut is the whole reason softmax and cross-entropy are paired. = 4. Layer 3 weights and biases = Let us multiply dL/dz3 by [a2 | 1]. One multiplication gives the gradient for W3 and b3 together. = 5. Layer 2 activations = We multiply dL/dz3 by W3 to get dL/da2. The gradient moves back across a layer the same way the signal moved forward. = 6. Layer 2 ReLU = Let us pass it through the gate: keep the gradient where the activation was positive, zero it everywhere else. = 7. Layer 2 weights and biases = We multiply dL/dz2 by [a1 | 1]. The same figure as step 4, one layer up. = 8. Layer 1 activations = Let us multiply dL/dz2 by W2. = 9. Layer 1 ReLU = We apply the same gate again, now on a1. = 10. Layer 1 weights and biases = Let us multiply dL/dz1 by [x | 1], and every weight in the network now has a gradient. = 11. Update = We subtract, and the network has learned. In practice a learning rate scales this step. The gradients: dL/dz3 = [0.5, -0.5, 0] dL/da1 = [1, -2, 2, -1] dL/dz1 = [0, -2, 2, -1] The takeaway: matrix multiplication is all you need. Just like the forward pass, backpropagation is matrix multiplications end to end. You can do every one by hand, slowly and imperfectly, which is exactly why a GPU's ability to do them fast mattered so much to deep learning. 💾 Save this post!

Tom Yeh

961,451 Aufrufe • vor 2 Monaten